Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Do we really need this since it's a Li-ion battery? I know Ni-Mh and Ni-Cad has memory effect, but not on the Li-Ion battery.
I was just wondering the same thing today....simply because there seems to be several different methods to do it. Some say charge 8 hours, turn off, charge and hour, unplug, turn on charge 10 minutes. Then other methods say to do something different....be nice to have an app to walk you through different methods so you know step by step your doing it right
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Click to expand...
Click to collapse
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
All the battery calibration tools, are basically deleting the file... right?
Is it that hard to boot into recovery and wipe battery stats?
deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Click to expand...
Click to collapse
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
paulieb81 said:
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
Click to expand...
Click to collapse
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
turn your brightness to 100% and change it so that it never turns off; use wifi tether and play a 720p movie at the same time; oc your kernel to it's highest stable frequency. it'll drain pretty quickly.
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
mykeldrip said:
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
Click to expand...
Click to collapse
That's because the phone stops charging when it reaches 100%, and runs off of battery probably until it reaches in the low 90s, then charges again. You won't ever notice this because the light will always be green. However, you'll notice that unplugging it a few moments after it turns green, the battery will stay anywhere from 100%-98% for a while. At least on my phone it does.
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
laydros said:
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
Click to expand...
Click to collapse
I am by no means an expert so if you find any reliable info on this and can link us to read, I would love to learn more. All I know is that it is commonly said to drain rechargeable batteries and that I have seen that topping them off very often does lead to battery life degradation.
Tyzing said:
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
Click to expand...
Click to collapse
There is no need to fully drain the battery. Its purpose in calibration is to configure the software that is correlating voltage to percentage charged. That's all. Regarding the old Apple advice, that is doing the same thing. It will not affect the hardware.
Now, what WILL affect the hardware is charging itself. Every charge/discharge cycle will reduce the total capacity of the battery. This is why the EVO will not cycle on it's own until 10% discharged. It's improving the overall battery life by that restriction.
In short, you will save money overall by getting a higher capacity battery that you don't force to charge too often. Draining your battery does nothing but give you peace of mind and it only really needs recalibrating when it's total capacity has been reduced which isn't often. 3-6 months.
Sent from my PC36100 using XDA App
herbthehammer said:
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
Click to expand...
Click to collapse
Yeah except that's not a good idea, it will kill the weak cells.
I understand. Still think it would be useful if it would do the "juice until LED changes" method while sleeping though
paulieb81 said:
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
Click to expand...
Click to collapse
I'm interested!
Btw - what are the charging calibrations people are using? Are you seeing one working better than another?
Im a noob, so take what I say worth a grain of salt but yesterday I did the standard method where you fully charge...turn off...plug back in until led changes green and do it a few times.
I went from 9 hours to 17 hours with no other changes except a few profiles in setCPU.
I did this just last night so my results are fresh.
Tyzing said:
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
Click to expand...
Click to collapse
A few SetCPU profiles is all it takes to see a dramatic increase in battery life, especially while screen off. If you disable it I bet whatever gain you think was from 'calibrating' it disappears.
Related
Morning all , the past 3 days I have been noticing that my Excalibur just shuts down and won't restart unless I plug it into a power source and power on.
Has this happened to anyone else?
torontotytn said:
Morning all , the past 3 days I have been noticing that my Excalibur just shuts down and won't restart unless I plug it into a power source and power on.
Has this happened to anyone else?
Click to expand...
Click to collapse
Sounds like you need a new battery
Thanks man - any specific one you can reccomend? Reason I am asking is cause I have seen people post different battery makes, models etc..
URL Links would be appreciated.
If that's all i have to do - it's an easy fix for a 200.00 phone!
Thank you.
torontotytn said:
Thanks man - any specific one you can reccomend? Reason I am asking is cause I have seen people post different battery makes, models etc..
URL Links would be appreciated.
If that's all i have to do - it's an easy fix for a 200.00 phone!
Thank you.
Click to expand...
Click to collapse
Take a look on ebay i use a 1150mAh but go for the 2200mAh and you'll be impressed, if you do a search for battery on here you will see what people recomend.
If you are already on a spare phone, try giving your excalibur a full charge, and turn it off. Allow the battery to drain out completely. And if possible repeat this once or twice more. Complete power drain will improve the average life span, and can be done atleast every 3 months on all normal devices, so as to increase the lifespan
ccpraveen said:
If you are already on a spare phone, try giving your excalibur a full charge, and turn it off. Allow the battery to drain out completely. And if possible repeat this once or twice more. Complete power drain will improve the average life span, and can be done atleast every 3 months on all normal devices, so as to increase the lifespan
Click to expand...
Click to collapse
Nice, that is good to know... Never really knew that... Plus also I wanted to ask... is it bad to charge your phone everyday when it is like at 50% of battery life...
Nice question.
Think about a tank. You fill it with wet cement. And u take the wet cement for use slowly away. Almost as soon as the tank is 20-30 percent empty, the cement is filled gently again, so as not to shakeup the cement at the bottom. After a while the cement at the bottom hardens, and u cant get it out for use. And same happens with the total amount of cement u could pour in. Earlier if u needed 25 pots to fill it up, now it gets filled with 10 pots or so.
Now think about the battery with multiple cells arranged inside. You fill it up. Then u use up the top 3-4 rows of small cells, and immediately fill those cells right back. This keeps on happening. What happens is that, the cells at the lower rows are never emptied, and the charge remains static there forever, and after a while the cells just freeze up. Meaning, it is not possible anymore to fill them up, or to use up the containing charge. So when u start filling up, the battery says charged fully pretty soon, cos there are less cells to fill up, and good enough, the charge falls dead soon too.
The above analogy was true on the days on Nickel Cadmium batteries. Now a days with Lithium polymer batteries, what they say is the charge is not stationary at one particular site and keeps on revolving all inside, so there is no question of dead cells arising. Well theoretically yes, but practically what the geeks suggest is to charge the battery only after completely draining it. Well, not really feasible with our busy lifestyles, as we cannot start a day taking the 30 percent battery with us.
This is what I have been doing, Charge it up as much as I need it during the weekdays. During weekends, when I am near a powersource, I keep it until it drains as much as empty. And once every 2-3 months, I try to make it empty fullest.
So I guess, it is more of a personal choice of ease also. Though the current dictum is that, charging the batteries at whatever level is ok, experience has shown many users to allow complete drain occasionally
thanks CC.. i will try that..give it a full die out and charge it up again.
If that doesn't work i'll get a new battery.
Appreciate it!
since you seem knowledgeable on batteries... i also wanted to ask how long do the batteries typically remain "usable" to a decent amount...
Aah not at all knowledgable. All I know is my own personal experiences plus data from a million sites that I read.
The typical duration and lifespan of a battery depends mainly on the capacity first of all, the more milliamps u have, the long lasting a battery is. Also the average life depends a lot of the number of charge cycles. Means, if u r a light user, u wnt have to charge it every now and then, the batt will slowly discharge, and then u charge it once or twice in a week.
For heavy users,at times myself included, I put it on charer more than once in a day. There the total number of chare cycles that the battery is alloted gets used up early, and the battery dies early.
A third factor is the amount of load we give to the OS. Not just playing heavy games or apps, but making calls in low reception areas as well as placing our hands over the antenna portion of the celphone while making calls, increase the load, and cause the battery to drain faster
ccpraveen said:
Aah not at all knowledgable. All I know is my own personal experiences plus data from a million sites that I read.
The typical duration and lifespan of a battery depends mainly on the capacity first of all, the more milliamps u have, the long lasting a battery is. Also the average life depends a lot of the number of charge cycles. Means, if u r a light user, u wnt have to charge it every now and then, the batt will slowly discharge, and then u charge it once or twice in a week.
For heavy users,at times myself included, I put it on charer more than once in a day. There the total number of chare cycles that the battery is alloted gets used up early, and the battery dies early.
A third factor is the amount of load we give to the OS. Not just playing heavy games or apps, but making calls in low reception areas as well as placing our hands over the antenna portion of the celphone while making calls, increase the load, and cause the battery to drain faster
Click to expand...
Click to collapse
Thanks for that information man...
i have the same problem with my phone just shutting off after about an hour on, only turning back on when plugged into a power source.
i've got a 2200ma battery on the way and i can't effing wait for it to get here.... i really hope it solves the problem cuz i already reinstalled the kavana rom thinking it was a software bug. reinstalling gave it a breath of fresh air nonetheless, while its on. lol
renegadedj said:
i have the same problem with my phone just shutting off after about an hour on, only turning back on when plugged into a power source.
i've got a 2200ma battery on the way and i can't effing wait for it to get here.... i really hope it solves the problem cuz i already reinstalled the kavana rom thinking it was a software bug. reinstalling gave it a breath of fresh air nonetheless, while its on. lol
Click to expand...
Click to collapse
Yah you will love your new battery for sure...
Same thing is (has been) happening to me. Thanks for the info as I was getting quite annoyed.
renegadedj said:
i have the same problem with my phone just shutting off after about an hour on, only turning back on when plugged into a power source.
i've got a 2200ma battery on the way and i can't effing wait for it to get here.... i really hope it solves the problem cuz i already reinstalled the kavana rom thinking it was a software bug. reinstalling gave it a breath of fresh air nonetheless, while its on. lol
Click to expand...
Click to collapse
Hey man - please reply on this post when you get the battery replacement to let us know if that helped solve the issue. If not i'll have to jump in the market for a new smartphone.
Theres nothing worse than being on a business call and you loose the call - and your phone usability with no power source around.
Please keep us posted.
torontotytn said:
Hey man - please reply on this post when you get the battery replacement to let us know if that helped solve the issue. If not i'll have to jump in the market for a new smartphone.
Theres nothing worse than being on a business call and you loose the call - and your phone usability with no power source around.
Please keep us posted.
Click to expand...
Click to collapse
yea i can deal with a call being dropped. but when the whole phone shuts off and when it wakes up ive got a message or a voicemail. thats the worst.
i have an old ericsson phone. maybe i'll throw that against the wall to take out my frustrations >=o lmao
just got 2200 battery in the mail. phones turned off and im charging the battery now.
now i need to find taht post wehre jdoggrz had a lengthy conversation about batteries and usages and drainages and whatnot....hmmmm... where is it...
just got 200 battery please advise
renegadedj said:
just got 2200 battery in the mail. phones turned off and im charging the battery now.
now i need to find taht post wehre jdoggrz had a lengthy conversation about batteries and usages and drainages and whatnot....hmmmm... where is it...
Click to expand...
Click to collapse
lol it was in this thread! ahahah
so please advise or tell me if im wrong. the 2200ma came with a 3/4 charge on it. i should use it until dead. then recharge. then tell dead, then recharge, and finally do taht a third time, before i even charge it while it still has a charge right?
renegadedj said:
lol it was in this thread! ahahah
so please advise or tell me if im wrong. the 2200ma came with a 3/4 charge on it. i should use it until dead. then recharge. then tell dead, then recharge, and finally do taht a third time, before i even charge it while it still has a charge right?
Click to expand...
Click to collapse
Yah you should do that... let it die 3 times and charge it fully, also do this about once every 2 weeks I would recommend okay... or whenever you can...
jdoggraz said:
Yah you should do that... let it die 3 times and charge it fully, also do this about once every 2 weeks I would recommend okay... or whenever you can...
Click to expand...
Click to collapse
thank you kindly for all the help
Will "trickle-charge" kernels end up damaging our phones? *UPDATE: 8 CASUALTIES!*
I installed one of these amazing new kernels the other day and loved it. I was even able to keep 100% for about 30 minutes of usage and I was amazed. Yet today I checked Phandroid and an article from an XDA contributer came up:
http://phandroid.com/2010/12/25/you...is-lying-to-you-and-its-not-such-a-bad-thing/
In the article he explained (from what I understand) that he thinks knows it is a GOOD THING that phones aren't programmed to allow the battery to keep charging at the real 100% because it would end up damaging the battery in the end, much like how many of the early cell phone batterys would get damaged.
Until I find out the answer I (sadly) switched back to my old kernel, as I would rather be safe than sorry, at least until I find out for sure.
Any responses?
UPDATES:
_______________________________________________________________
CASUALTY LIST (please PM me any casualties, the list seems to be growing in numbers rapidly)
_______________________________________________________________
Battery Emitting "Smoke" : http://forum.xda-developers.com/showthread.php?t=904577
Battery Failure during Trickle Charge: http://forum.xda-developers.com/showthread.php?t=900412
SBC killed my battery: http://forum.androidcentral.com/htc-evo-4g-roms-hacks/51972-sbc-killed-my-battery.html
MIUI + Savage = dead battery http://forum.xda-developers.com/showpost.php?p=10422140&postcount=9 and http://forum.xda-developers.com/showpost.php?p=10432778&postcount=139
ANOTHER dead battery http://forum.androidcentral.com/htc-evo-4g-roms-hacks/51972-sbc-killed-my-battery-2.html#post517436
Battery loses charge after extended time with sbc kernel http://forum.xda-developers.com/showpost.php?p=10431788&postcount=49
Another one bites the dust... http://forum.xda-developers.com/showpost.php?p=10457753&postcount=162
COUNT ME IN http://forum.xda-developers.com/showpost.php?p=10469184&postcount=174
Current Count: 8
___________________________________________________________________
Various Dev Reactions:
Ziggy's editorial on WHY these kernels shouldn't exist and are dangerous (written before the new epidemic of dead batteries):http://www.ziggy471.com/2011/01/02/overcharging-batteries/
Netarchy's post explaining why he's REMOVING all SBC kernels from his page: http://forum.xda-developers.com/showpost.php?p=10421166&postcount=6185
___________________________________________________________________
THIS IS A CALL TO ALL ROM/KERNAL DEVELOPERS: Please don't include this feature in our favorite roms. I have been having to switch Kernels on my latest roms becuase I don't want to risk killing my battery (and that is a PAIN)
My $0.02:
I trust these developers on this site ALOT. What they have managed to do with the software is amazing. However, software is software. These trickle-charge kernels were amazing SOFTWARE-WISE. However, the effects of charges on batteries are not your specialty, so while it may be amazing that you all developed these kernels, there effect on the battery is not alright. I (sorry) trust an industry of battery/software engineers over some basement-developers who like pushing the limits (Pushing the limits is awesome, just not when it comes to batteries lol)
hmsheen10 said:
I installed one of these amazing new kernels the other day and loved it. I was even able to keep 100% for about 30 minutes of usage and I was amazed. Yet today I checked Phandroid and an article from an XDA contributer came up:
http://phandroid.com/2010/12/25/you...is-lying-to-you-and-its-not-such-a-bad-thing/
In the article he explained (from what I understand) that he thinks knows it is a GOOD THING that phones aren't programmed to allow the battery to keep charging at the real 100% because it would end up damaging the battery in the end, much like how many of the early cell phone batterys would get damaged.
Until I find out the answer I (sadly) switched back to my old kernel, as I would rather be safe than sorry, at least until I find out for sure.
Any responses?
Click to expand...
Click to collapse
Yup, there is a reason why all the phone makers have them charge like that and there is also a reason why putting custom roms on your phone voids your warranty.
Remember hearing about all those ipod and lap top batteries that liked to blow up?
Edit: he's also forgetting that when the battery gets close to full the voltage starts changing less and less, to the point that it is nearly impossible to accurately tell how much battery you have when it is over 80% full
Sent from my PC36100 using XDA App
i knew it was too good to be true :\
yea i get amazing battery life with this trickle charging only when i leave it on charger for around 7+ hours. Sounds like i should stop using that then damn
Edit: didnt mean to quote anyone
From what I read the article didnt reveal any specifics to if and when it will damage a battery.The article seemed to suggest that because battery manufacturers changed how they implimented charging it means that trickle charging is bad. It does not have enough variables in this observation to come to any conclusion. If advancements have been made in the battery industry you could also come to the conlcusion that trickle charging is or would be ok.
I am not trying to go against the article or this thread but simply wondering if after a thorough evaluation of the battery capacity after say 3 months using trickle charging and one without trickle charging we give an conclusion.
If need be I will run my phone with trickle charging, will someone else volunteer there phone for research?
For the extra bump I get every day now Ill by a new battery for 15 bucks a little more often. Its worth it for me YMMV
Yep, trickle charging is bad for the battery. Rememebr when all those laptop batteries were catching on fire? Same thing could potentially happen if your battery is not charged properly. They charge the batteries the way they do for a reason. That reason is relatively long battery life and safety.
Here is a good article on the subject.
I think that the makers of all these new kernels than should put up a warning specifically pertaining to the dangers of the kernel
Sent from my EVO
Quoting ms79723 :
Will this damage my battery?
This charging method doesnt damage the batteries at all. It shouldnt. Because our batteries dont even charge up to 4.2V without the tweak. They charge up to 4.2V the first charge, then drop all the way down to 4.08V or something and then does these weird short burst chargers to 4.1-4.125V. Thats why there's the rapid drop in the morning. Because your voltage is actually at 4.125V and that's not 100%. So with this tweak, the charger keeps charging until you're at 4.2V (or the maximum voltage your battery can get to) and then it trickle chargers while at that voltage. The charger itself never turns off. Thats not a bad thing. Because as you reach your actual voltage, the mA decreases. Which is why our phones will never be damaged. You ever want to know why its really easy to charge from 50-80% but the charge from 90-100% seems to take so long? Its because from 50% the mA going into the phone is in the 600's. Once it reaches 90%, the mA is around 150 and once it reaches 95% you're looking at 90mA. The phone when absolutely idle uses anywhere from 60-120mA, even when on the charger. So charging from 90% to 100% takes longer becaus the mA going into the phone isnt always higher than the mA you're losing. This is the same with charging past 100%. As you leave the phone on the charger with this tweak, you're mA will decrease from 50mA all the way down to 2mA overnight. But on the charger you're losing about 30-60mA already, so you'll never overcharge the battery, in best case scenarios, you'll just maintain the voltage of 4.2 or around 4.2V.
Click to expand...
Click to collapse
Unfortunately, if you read their thread, they say they disagree that any harm is being done.
Personally, I am not a battery expert, though I do have some experience with them in the EV car field, but my understanding is these batteries will be damaged if continuously held at a full charge. That is why the manufacturers design the system to full charge, then discharge to approximately 90% and then charge again, continuously cycling the battery.
From what I have read and from talking to the guys who design Li-ion batteries, they say that prolonging the time that the battery is at full charge significantly reduces battery life. Over time it can also lead to overheating resulting in an unsafe battery. For those reasons, virtually all properly designed charging circuits for Li-ion batteries are set up to let the battery sit at full charge for the shortest time possible.
Vann's quote from the kernel thread proves my point, what it appears they are trying to do is hold the battery fully charged while it is on the charger. That might increase the amount of time you can run your phone in the short run. But in the long run it will kill the battery.
I suggest you guys RELAX and try to stick with the responsibility of handling your phone the easiest way possible. Being not the hardest way to learn, but you eventually find the way to start new each time you look at your phone. Just saying kinda like when I have my EVO, It is just peachy to have. I don't want to tear the skin or even puncture the screen. LOL Like a PEACH?
I'm imaginative today and well, I always try to keep my phone in cool conditions, for short say. I use Juice Defender with Ultimate Juice with a good nice kernel and ROM that suits it as it suits.
alekosy said:
I suggest you guys RELAX and try to stick with the responsibility of handling your phone the easiest way possible. Being not the hardest way to learn, but you eventually find the way to start new each time you look at your phone. Just saying kinda like when I have my EVO, It is just peachy to have. I don't want to tear the skin or even puncture the screen. LOL Like a PEACH?
I'm imaginative today and well, I always try to keep my phone in cool conditions, for short say. I use Juice Defender with Ultimate Juice with a good nice kernel and ROM that suits it as it suits.
Click to expand...
Click to collapse
wtf.........?
Well its just like rooting and flashing custom roms, it may do this it may do that. If its such a concern don't use it. I'm using it and my phone doesn't take 7 hours to charge and it doesn't overheat at all, its a risk I am taking and I don't hold the developer responsible for it if something goes wrong. I understand the concern about this and I'm sure he will add a disclaimer.
wow and i was just starting to appreciate the new kernels. thanks for ruining it for me guys...
haha no i guess thanks for saving me....
dkdude36 said:
wow and i was just starting to appreciate the new kernels. thanks for ruining it for me guys...
haha no i guess thanks for saving me....
Click to expand...
Click to collapse
Agreeeeeeeeeed!
wfrandy said:
Yep, trickle charging is bad for the battery. Rememebr when all those laptop batteries were catching on fire? Same thing could potentially happen if your battery is not charged properly. They charge the batteries the way they do for a reason. That reason is relatively long battery life and safety.
Here is a good article on the subject.
Click to expand...
Click to collapse
This article is confusing because it says 2 different things:
1. The current "trickle charging" kernels are safe but we should be calling them "topping off" instead:
Full charge is attained after the voltage threshold has been reached and the current has dropped to 3% of the rated current or has leveled off.
Click to expand...
Click to collapse
The kernels drop to 0mA at 4.20V, so the voltage threshold is reached and the current safely drops.
2. The kernel is not safe because it keeps the battery at 4.20V/cell continuously:
No trickle charge is applied because lithium-ion is unable to absorb overcharge. A continuous trickle charge above 4.05V/cell would causes plating of metallic lithium that could lead to instabilities and compromise safety. Instead, a brief topping charge is provided to compensate for the small self-discharge the battery and its protective circuit consume. Depending on the battery, a topping charge may be repeated once every 20 days.
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What am I missing?
guys... this is from the article put up:
When charging above 4.30V, the cell causes plating of metallic lithium on the anode; the cathode material becomes an oxidizing agent, loses stability and releases oxygen. Overcharging causes the cell to heat up. If left unattended, the cell could vent with flame.
The "trickle charge" kernels never go near 4.30v, mine stops at 4.19. Also, the temperature during the "trickle" overnight is very low. after 8 hours of "trickling" my battery was at 30 degrees C. Only time will tell if the battery life is SLIGHTLY shortened from this charging, but it is in NO WAY NEAR exploding, catching fire, blah blah blah. Stop scaring people, read the articles you post yourself and actually look at what is going on in these kernels. You may surprise yourself!
Now, if you cant get a replacement battery because you live on the moon and want your battery life to stay 3 years instead of 2 1/2, then it is your choice to not use these kernels, but dont scare others away just because you don't want to partake.
aph said:
This article is confusing because it says 2 different things:
1. The current "trickle charging" kernels are safe but we should be calling them "topping off" instead:
The kernels drop to 0mA at 4.20V, so the voltage threshold is reached and the current safely drops.
2. The kernel is not safe because it keeps the battery at 4.20V/cell continuously:
What am I missing?
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hmsheen10 said:
wtf.........?
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Jfree3000 said:
Well its just like rooting and flashing custom roms, it may do this it may do that. If its such a concern don't use it. I'm using it and my phone doesn't take 7 hours to charge and it doesn't overheat at all, its a risk I am taking and I don't hold the developer responsible for it if something goes wrong. I understand the concern about this and I'm sure he will add a disclaimer.
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dkdude36 said:
wow and i was just starting to appreciate the new kernels. thanks for ruining it for me guys...
haha no i guess thanks for saving me....
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hmsheen10 said:
Agreeeeeeeeeed!
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LOL I don't know, but battery trickling isn't good to be heard to deal nicely with these EVOs, but If you wanna try to give it a run or a test on your own, be prepared that you voided your warranty.
alekosy said:
LOL I don't know, but battery trickling isn't good to be heard to deal nicely with these EVOs, but If you wanna try to give it a run or a test on your own, be prepared that you voided your warranty.
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Your warranty was void as soon as you were able to flash a kernel... seriously... (I still have had a screen replaced from separating though!)
Look! A brand new battery for your EVO for $2.92 shipped!!
http://cgi.ebay.com/1500-mAh-HTC-Ex...ccessories&hash=item4aa608f2c7#ht_3246wt_1198
I guess I don't care if I have to replace them... just as long as they last an extra couple of hours everyday...
You all know that there is NO WAY it can hurt the actual phone, right???
sd2649 said:
Your warranty was void as soon as you were able to flash a kernel... seriously... (I still have had a screen replaced from separating though!)
Look! A brand new battery for your EVO for $2.92 shipped!!
http://cgi.ebay.com/1500-mAh-HTC-Ex...ccessories&hash=item4aa608f2c7#ht_3246wt_1198
I guess I don't care if I have to replace them... just as long as they last an extra couple of hours everyday...
You all know that there is NO WAY it can hurt the actual phone, right???
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And try JuiceDefender with UltimateJuice, the 2nd app is a small fee paid app for donation, but it's very useful with the right kernel and rom for your liking. Trust on that, I think everyone would probably agree that this way would be the safest legit way.
When I got my one x roughly two weeks ago, battery life wasn't really that good. 8 hours max with a couple of hours of screen time. But I always calibrate my battery. When I got it I charged it for 8 hours then drained it then did the same thing for a whole week just using the phone till the battery runs out and then charge it for 5 hours... Now battery life is very good, EASILY last me through a whole day with moderate to heavy usage. Lots of tapatalk 2, browsing, messaging and emails. I'm also running ARHD rom so that also help but nonetheless battery calibration is important so do it people
Never calibrated or whatever, have excellent (for me) battery life.
I thought we got over this myth.....
OP, do you have some supporting evidence, or even logic, that shows that doing exactly what you shouldn't do with a li-po battery has a positive effect?. Have you A /B tested it against another handset where you treated the li-po battery as recommended? I.E, avoiding fully discharging it and preferably charge from around 50%.
I get up to 4 hours screen time and 4-5 days standby having treated the battery this way with just a handful of total discharges (obviously it not always possible to avoid)
farnsbarns said:
OP, do you have some supporting evidence, or even logic, that shows that doing exactly what you shouldn't do with a li-po battery has a positive effect?. Have you A /B tested it against another handset where you treated the li-po battery as recommended? I.E, avoiding fully discharging it and preferably charge from around 50%.
I get up to 4 hours screen time and 4-5 days standby having treated the battery this way with just a handful of total discharges (obviously it not always possible to avoid)
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Do I have evidence? No I didn't capture any screentshots or anything. This is from my personal experience I'm not here to prove to you anything, just sharing how my battery life is improving cause of battery calibration. My phone no longer display for example 25% then soon as I use it jumps to 19% like before. It decreases gradually and I get excellent battery life. Same thing with my I pad when is discharge it completely then recharge it, I see better battery life and better battery % display accuracy.
barondebxl said:
Do I have evidence? No I didn't capture any screentshots or anything. This is from my personal experience I'm not here to prove to you anything, just sharing how my battery life is improving cause of battery calibration. My phone no longer display for example 25% then soon as I use it jumps to 19% like before. It decreases gradually and I get excellent battery life. Same thing with my I pad when is discharge it completely then recharge it, I see better battery life and better battery % display accuracy.
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Li - po batteries do improve with the first few charge cycles but this has nothing to do with the fact you have run it flat. Doing so regularly will shorten the life of the battery. You stated that it had a positive effect but you have no comparison and it flys in the face of the laws of physics and chemistry. The point of my post was to make it clear to anyone who doesn't know better that it's bs and will be detrimental to battery life.
Though LiPo batteries don't like to be overly discharged, I'd stop short of saying that this is detrimental to your battery. LiPo batteries shouldn't be left at low voltage (dead) for long periods of time, but discharging it entirely and then recharging it is well within the designed specs of the battery. It's more the fact that they lose charge over time, and therefore leaving them dead which is considered their minimum safe voltage, will then allow them to drain further themselves over time to a point where it's detrimental. I suppose, though, a battery drained to 0% every single time is more likely to have a shorter life than a battery discharged only to 20% before recharging.
The Android system does calibrate the battery life, which is more of what you'd be doing, but you aren't going to get more battery life out of a battery by discharging it entirely, then charging it fully, it just doesn't work like that. LiPo batteries don't have issues with memory or needing to be discharged or charged to a certain point for optimum performance.
I 100% attribute bad battery life when you first get a phone to simply being you pulling it out and turning it on more than you normally would. It's nearly impossible, and damn near subconscious, but when you get a new toy, you're obviously going to pull it out to look at it, play with it, load every different app it has, etc, as well as doing the same when you show it to people. I think even if you think you didn't play with it a lot when you first got it, you likely still do. But that's just my opinion.
https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
read that calibration not needed
AJerman said:
Though LiPo batteries don't like to be overly discharged, I'd stop short of saying that this is detrimental to your battery. LiPo batteries shouldn't be left at low voltage (dead) for long periods of time, but discharging it entirely and then recharging it is well within the designed specs of the battery. It's more the fact that they lose charge over time, and therefore leaving them dead which is considered their minimum safe voltage, will then allow them to drain further themselves over time to a point where it's detrimental. I suppose, though, a battery drained to 0% every single time is more likely to have a shorter life than a battery discharged only to 20% before recharging.
5
The Android system does calibrate the battery life, which is more of what you'd be doing, but you aren't going to get more battery life out of a battery by discharging it entirely, then charging it fully, it just doesn't work like that. LiPo batteries don't have issues with memory or needing to be discharged or charged to a certain point for optimum performance.
I 100% attribute bad battery life when you first get a phone to simply being you pulling it out and turning it on more than you normally would. It's nearly impossible, and damn near subconscious, but when you get a new toy, you're obviously going to pull it out to look at it, play with it, load every different app it has, etc, as well as doing the same when you show it to people. I think even if you think you didn't play with it a lot when you first got it, you likely still do. But that's just my opinion.
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The dtremental effect will be minute, accepted, but there is certainly nothing to gain. That's what I wanted to make clear.
There is a lot of guesses portrayed as fact on here these days, as well as conclusions drawn from dubious experience with no control or comparisons. Just trying to combat this misinformation.
farnsbarns said:
The dtremental effect will be minute, accepted, but there is certainly nothing to gain. That's what I wanted to make clear.
There is a lot of guesses portrayed as fact on here these days, as well as conclusions drawn from dubious experience with no control or comparisons. Just trying to combat this misinformation.
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I know what you mean. I usually get yelled out when I try to do that and help, haha.
farnsbarns said:
Li - po batteries do improve with the first few charge cycles but this has nothing to do with the fact you have run it flat. Doing so regularly will shorten the life of the battery. You stated that it had a positive effect but you have no comparison and it flys in the face of the laws of physics and chemistry. The point of my post was to make it clear to anyone who doesn't know better that it's bs and will be detrimental to battery life.
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It flys in the face of the laws of physics??!!!??? What the hell are you talking about? I'm talking about my battery life getting better and better cause of draining it and recharging it not the gravity of the moon or Einstein theories, relax.
farnsbarns said:
The dtremental effect will be minute, accepted, but there is certainly nothing to gain. That's what I wanted to make clear.
There is a lot of guesses portrayed as fact on here these days, as well as conclusions drawn from dubious experience with no control or comparisons. Just trying to combat this misinformation.
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LMAO, get out of your basement.
AJerman said:
I know what you mean. I usually get yelled out when I try to do that and help, haha.
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Yep, I just don't care if the truth means a fan of cereal box science gets their knickers in a twist. More than half of what gets posted now is erroneous guess work, assumptive, misleading noise that serves no purpose other than to dilute the factual helpful discussion.
I've never been much good at biting my lip.
farnsbarns said:
Yep, I just don't care if the truth means a fan of cereal box science gets their knickers in a twist. More than half of what gets posted now is erroneous guess work, assumptive, misleading noise that serves no purpose other than to dilute the factual helpful discussion.
I've never been much good at biting my lip.
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That's fascinating..... I wonder where that battery calibration thing started in the first place, I guess someone made that up just to mess with people right?
barondebxl said:
That's fascinating..... I wonder where that battery calibration thing started in the first place, I guess someone made that up just to mess with people right?
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For batteries that needed calibration? And as I said, a lot of people confuse calibrating the battery meter in the OS with calibrating the battery itself.
Read, learn: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
AJerman said:
For batteries that needed calibration?
Read, learn: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
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Read this, point 2.
http://osxreality.com/2009/07/18/4-tips-to-extend-your-lithium-battery-life/
To all of you who say that using up your battery shortens it's life, I have just one thing to say: the phone will never let you fully discharge the battery. Approx. 3.5V at which the phone turns off is far from the voltage of fully discharging (and potentially damaging) the battery.
Sent from my HTC One X using xda premium
barondebxl said:
Read this, point 2.
http://osxreality.com/2009/07/18/4-tips-to-extend-your-lithium-battery-life/
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As I said, this has nothing to do with calibrating the battery, and everything to do with calibrating the battery meter in the OS, which, by the way, will never be off by HOURS, maybe by a couple of minutes. This only needs to be done once every however many cycles, that site says 30, but I wouldn't even bother doing it more than once every couple of months at the most as you likely won't see any real gain from doing so, and it IS theoretically bad to overly discharge your phone. Doing it once in a while won't damage anything, but doing it every cycle, or every day for a week or anything like that is excessive, unnecessary, and, as farnsbarns mentioned, can wear on your battery.
Battery meter calibration has been discussed on this message board countless times, and every time it's proven to be nearly pointless in real tests.
Edit: This is not to mention that I think a lot of batteries/phones have charging circuits built into them that allows them to properly check the battery level itself, meaning calibration of the OS isn't necessary. I could be wrong on this, but I'm pretty sure I've read about this before.
AJerman said:
As I said, this has nothing to do with calibrating the battery, and everything to do with calibrating the battery meter in the OS, which, by the way, will never be off by HOURS, maybe by a couple of minutes. This only needs to be done once every however many cycles, that site says 30, but I wouldn't even bother doing it more than once every couple of months at the most as you likely won't see any real gain from doing so, and it IS theoretically bad to overly discharge your phone. Doing it once in a while won't damage anything, but doing it every cycle, or every day for a week or anything like that is excessive, unnecessary, and, as farnsbarns mentioned, can wear on your battery.
Battery meter calibration has been discussed on this message board countless times, and every time it's proven to be nearly pointless in real tests.
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Nothing to do with battery calibration? Have you read the article? If you want accurates readings, you want your battery life to improve, you probably want to calibrate your battery. I've had the one x for almost two weeks and my phone doesn't jump from 50% to 42% randomly anymore cause I've calibrated the battery. If you want more reading : http://www.themobileindian.com/news/5547_How-to-calibrate-smartphone-battery
No one here said that it is something you need to do everyday, but when you get your phone I suggest doing it. Then once it's calibrated do it once a week or every other week.
AJerman said:
Edit: This is not to mention that I think a lot of batteries/phones have charging circuits built into them that allows them to properly check the battery level itself, meaning calibration of the OS isn't necessary. I could be wrong on this, but I'm pretty sure I've read about this before.
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they do have charging circuits I just read it, still you want accurate readings. Even my iPad sometimes displays wrong battery percentage when I don't let it discharge. Sometimes I charge it when it's at like 28% for example, let it fully charge but then it drains weirdly.
barondebxl said:
Nothing to do with battery calibration? Have you read the article? If you want accurates readings, you want your battery life to improve, you probably want to calibrate your battery. I've had the one x for almost two weeks and my phone doesn't jump from 50% to 42% randomly anymore cause I've calibrated the battery. If you want more reading : http://www.themobileindian.com/news/5547_How-to-calibrate-smartphone-battery
No one here said that it is something you need to do everyday, but when you get your phone I suggest doing it. Then once it's calibrated do it once a week or every other week.
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You are failing to listen to what I'm saying. I've read the article, and many others like it. There is no such thing as calibrating Lithium batteries, and it's a common misconception, so I have full faith that you can find countless web pages telling you you can. It comes from the old mindset of batteries that did need certain charge cycles (full discharge, full charge, etc) to maintain life.
Again, the only thing you calibrate when you run the battery all the way down is the OS's battery meter. Android shuts itself down automatically when battery voltage hits a level that is considered empty or dead, regardless of what the battery meter says, so that calibration gives you no more life out of your battery at all.
However, I think we all run down our phones to the point where they auto shutdown more than frequently enough to consider the battery meter calibrated very close at any given time. Battery meter calibration is more an issue on systems that stay plugged in frequently and don't often get discharged, this is usually with laptops used as a desktop replacement, not phones.
We aren't trying to be mean or anything, just trying to squash the continued misconception that calibrating the battery is possible or has any effect.
I have been searching as to what is the proper way to cycle charge so I can get the best battery life after installing new kernel and ROM.
However I seem to find different answers
One to drain in completely others say don't?
What do I do?
Unless someone links you to a peer reviewed research paper, you will be reading random anecdotes.
proud a-clown said:
Unless someone links you to a peer reviewed research paper, you will be reading random anecdotes.
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I wouldn't consider the manufacturer's suggested charging cycles to be "random anecdotes" even if they're not published in a peer reviewed journal.
"Completely draining" should not be practiced on a regular basis with lithium ion. You can't (or shouldn't be able to) reach an actual complete drain before the phone shuts down. If you could (or ever do) the battery would become useless to you as there is a point of low discharge where lithium ions can no longer be charged by a standard charger.
And while most of the time the shut down of the phone and the subsequent charger connection happens before this point - there have been plenty of people who have let their phones go till they shut down then go to charge their battery only to find it will no longer charge.
So every time there is a drain of your battery to the point your phone shuts off you get real close to that point where you will no longer be able to charge that battery (unless your one of those techno chemist electrical engineer types with all the appropriate tools and materials handy).
Sent from my SAMSUNG-SGH-I747 using XDA Premium HD app
http://www.dansdata.com/gz011.htm
And i know i've read somewhere about someone suggesting that people go through this arduous process of draining the battery to a point, charging it fully, draining it completely, and charging it fully again (or something crazy like that... i don't remember exactly) to make the phone detect the full capacity of the battery and avoid any "memory effect", and i believe that whole idea was even shot down by someone at Google who works on the Android OS as being a complete crock.
I really don't think there is any PROCESS that can be done to give you the optimal battery life, aside from what can be done to prevent apps from draining the battery constantly. Some people recommend having a fully charged battery, or having the phone plugged in when you wipe the phone and install a new ROM... i've rarely done that. I've even wiped and installed roms at like 40% battery life... sometimes a bit lower. But in my experience, battery life has more to do with the ROM being used than what you did to try to MAKE the battery life better.
Running a touchwiz-modded ROM like DrewGaren's Serenity and stuff, i'd generally be lucky to get a full day of battery life seemingly no matter how much or how little i used the phone. I'm not what i'd consider a heavy user.... haven't really used my phone much all day today, though it did spend a good portion of the day on the charger. But i'm running the latest build of Task & Ktoonsez AOKP ROM, and it's been on battery for 9.75 hours and is still at 85%... but that's only with 20 minutes of screen time.
Anyway.... all i can say is from my own personal experience, but i don't think there is really any definitive process one can follow to improve battery life beyond what the software itself will do anyway.
Whether or not it has any effect on actual battery performance i would say that running a 'full' cycle or two of drain and charge for android to learn the battery capacity. Probably doesn't have much affect on a stock battery but when i purchased my 4400mah battery it took a few cycles to get an accurate reading from the charge meter. It would drain down to the warning in what it was expecting the stock 2100mah to be dying and ran FF3 for atleast 2 hours non stop on 1-5% until the battery actually gave out. On top of that it couln't decided how much it really wanted to say was remaining, it would jump up and down a percent or two, obviously confused of what to do. Whether or not its necessary to run it to this point is debatable, but with android or myself not knowing how much charge was actually left in the battery i did.
http://forum.xda-developers.com/showthread.php?p=3846897#post3846897
http://www.batteryuniversity.com/partone.htm
How is everyone finding the battery life. Personally, I am finding it just plain horrible. I'm not sure what the issue is specifically but either something is draining it or it is just really that bad, in which case I will return it. I can't get a day's worth of moderate use out of it. It seems to be at most half of what I get from my note 10.1 and they aren't set up any differently. I've tried some of the basics like turning down the screen brightness (which annoys me), turning off the smart stay (but why have a feature you can't use), tweaking email checking settings, turning off samsung sync, turning off bluetooth (don't use it), and locations services. Is anyone else seeing this as an issue and does anyone have any additional suggestions for me to try?
Thanks in Advance
I get about two days between charges on mine. I get a decent amount of usage on a daily basis between email, Facebook, and candy crush. I even have Google Now running. How many charge cycles have you been through?
05GT said:
I get about two days between charges on mine. I get a decent amount of usage on a daily basis between email, Facebook, and candy crush. I even have Google Now running. How many charge cycles have you been through?
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If by charge cycles you mean fully discharging the phone until it shuts off, I haven't done that, but could give it a shot. It has gone down to 10% several times though.
No battery problems here. I wouldn't blame charge cycles, if they have any effect at all, it is minor. If I were you, I would do a factory reset, followed by an exchange if the reset doesn't fix it.
I have smart stay on , backlight on auto, and take no extra precautions for battery savings.
DownTFish said:
How is everyone finding the battery life. Personally, I am finding it just plain horrible. I'm not sure what the issue is specifically but either something is draining it or it is just really that bad, in which case I will return it. I can't get a day's worth of moderate use out of it. It seems to be at most half of what I get from my note 10.1 and they aren't set up any differently. I've tried some of the basics like turning down the screen brightness (which annoys me), turning off the smart stay (but why have a feature you can't use), tweaking email checking settings, turning off samsung sync, turning off bluetooth (don't use it), and locations services. Is anyone else seeing this as an issue and does anyone have any additional suggestions for me to try?
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Can you please post some screen shots of your battery life at the end of a typical cycle? It will help with comparisons by giving us more details on your running apps, screen-on display times, etc. Also, what wakelocks do you have? Use BetterBatteryStats or Wakelock Detector from the Play store for that. This info might help us to identify just how much drain is related to rogue apps or the general battery life itself.
sefrcoko said:
Can you please post some screen shots of your battery life at the end of a typical cycle? It will help with comparisons by giving us more details on your running apps, screen-on display times, etc. Also, what wakelocks do you have? Use BetterBatteryStats or Wakelock Detector from the Play store for that. This info might help us to identify just how much drain is related to rogue apps or the general battery life itself.
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Thanks. Just downloaded BetterBatteryStatus. I'll let it run for a bit and see what comes up. I'll post what I came up with with screen shots from it. Thanks for pointing me in a direction.
Also, it'd help to know how many hours "just plain horrible" is.
I'm not delighted by the battery life I'm seeing, I'm finding I want to charge every night, and that I can easily consume 15% / hour or more even without the screen turned up past 20-25%. (watching video off the NAS in the house.)
Then again, this is the first LCD display I've been able to read in full sunlight, and that's remarkable to me. I often wind up with full sun in the morning when I get up, and am delighted that if I did charge overnight I can use the device even then.
The battery needs some initial "training".
Charge fully on the first and run it all the way down to nearly zero, and fully charge again.
DO NOT interrupt the initial charge.
Battery life is great here after 5 cycles running it to 1% and recharging full at first it was draining faster but now I can watch 4 hours of netflix and still have 25% left nice thing is that the battery charges superfast so no worries
DownTFish said:
If by charge cycles you mean fully discharging the phone until it shuts off, I haven't done that, but could give it a shot. It has gone down to 10% several times though.
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10% is just fine, for purposes of calibrating the battery meter. Preferable actually. You shouldn't actually drain the device until shutdown. There are safeguards that are supposed to ensure the battery voltage does not drop too low (its not actually zero when the phone shuts down). However, in reality these safeguards are not always failsafe and I've seen plenty of cases on various Android devices where letting the battery drain to shutoff renders the battery unable to take a charge (below the minimum threshold voltage). Sometimes, letting the battery charge overnight will bring the battery back. Otherwise, you are pretty screwed, as the only remedy would be a battery meter with a boost function.
In any case, the battery meter is not very accurate, even under the best of circumstances, so letting it drain to 10% is plenty accurate enough. Then let it charge to 100%, and let it sit at full for a while, as fully saturating the battery takes extra time.
---------- Post added at 11:15 AM ---------- Previous post was at 11:08 AM ----------
That said, its hard to say what "moderate use" means. Everyone uses their devices differently. If you are playing intensive games, downloading files, heavy internet usage, it can drain the battery much faster than other activities. And the number of hours of screen-on time is key. So the idea of getting some battery stats and screenshots, is a good one.
I haven't been tracking screen-on time myself. But I find the battery to be decent. I use it a good amount in the evening (don't bring it to work) mostly for reading and web browsing. I have brightness on 40-50% usually (sometimes less, if the room is darker). The battery was just under 40% after 2 nights of use (maybe 40 hours after the last charge). Just guessing, but maybe 3 or 4 hours of screen on time?
Some online reviews mentioned the battery life is not as good as some other comparable devices (such as Nexus 7 and iPad Mini). Not surprising, since the Note 8 has a faster processor and higher resolution screen than either. And so far, battery life is not amazing, but seems comparable or better (better drain while idle) than my old HTC Flyer tablet. So for me, thats just fine.
I got about 4 hours screen-on time on my first battery cycle with heavy usage. Was playing games, movies, internet browsing, etc. My second and third cycles were better, giving me 5-6 hours screen-on time with moderate to heavy usage. Didn't really play any movies, but did play a fair amount of games and stuff.
On those later cycles my screen-on drain represented about 85% of my overall drain. This leads me to say that you can expect 4.5-6.5 hours of screen-on time with the Note 8, depending on usage. Keep in mind that I keep wifi always on, disabled bluetooth/auto-sync/smart stay, stopped some running apps like Maps and Factory Test, and kept brightness down to about 15% of the max setting.
Screen is definitely the big drain here, and these results lead me to believe that even with root and apps like Greenify I would not get much better results. Looks like any further battery savings will need to come from a custom kernel and custom rom (unless maybe you root and then underclock/undervolt using a third party app like Voltage Control or SetCpu). Anyone else have similar (or different ) results?
mingkee said:
The battery needs some initial "training".
Charge fully on the first and run it all the way down to nearly zero, and fully charge again.
DO NOT interrupt the initial charge.
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dumbest thing wrote in this thread probably. You do not need to train or do a full charge. How come people still believe that nonsense in 2013 ??
Bagbug said:
dumbest thing wrote in this thread probably. You do not need to train or do a full charge. How come people still believe that nonsense in 2013 ??
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:what:...XDA is for fun and for sharing; not for putting others down. Please be a little more respectful towards forum users when you post in the future. If you disagree with something then just explain so we can all learn together.
I am assuming the Note 8 has a lithium based battery. I couldn't confirm it though. The below link has some tips for how to care for different type of batteries. Useful reading.
http://www.techrepublic.com/blog/tablets/how-and-when-to-charge-your-tablet-battery/814
Sent from my GT-N5110 using xda app-developers app
Although the battery life is of concern to me, the fact it charges via a micro USB input rather than propriatry cable alieviates that worry (looking at you Apple). I dont think I go anywhere where there isnt a charger available thanks to the amount of devices that use them.
Bagbug said:
dumbest thing wrote in this thread probably. You do not need to train or do a full charge. How come people still believe that nonsense in 2013 ??
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While his terminology might have been a bit clumsy, he is not completely incorrect.
The terminology of "training the battery" invokes the concepts of conditioning the old technology NiCad batteries to prevent memory effects, which are not a concern with Li ion batteries, which is what you seem to be referring to. Folks on XDA will often talk about conditioning or calibrating the battery, which can be a bit misleading (as often they have the behavior of the old NiCad batteries in mind when saying this).
However, it is true that the battery meter needs to be calibrated to be completely accurate. This calibration has no chemical effect on the battery itself (like it does with NiCad batteries) but simply effects how the current readings are displayed by the % battery meter on the device's screen. Without fully charging and draining the device, it doesn't have fully accurate "flags" associated the current to battery %.
http://batteryuniversity.com/learn/article/battery_calibration
Failure to calibrate the meter won't have a negative chemical effect, like failure to periodically condition a NiCad battery. And therefore it won't have an affect on the battery life. But properly calibrating will give you the most accurate % battery reading possible. The battery meter is not accurate out of the box, after a ROM flash, and an OTA may also reset the calibration.
As I've already mentioned in a previous response, I don't recommend draining the battery to shutoff. As doing so can lead to the battery no longer taking a charge, and the device no longer powering on. Its rare, but it does happen. Fully changing, then draining to 10% or so is enough. Full cycles are also not good for the long term life of the battery, although just doing it once every few months is still acceptable.
---------- Post added at 10:21 AM ---------- Previous post was at 10:07 AM ----------
kisrita said:
I am assuming the Note 8 has a lithium based battery. I couldn't confirm it though. The below link has some tips for how to care for different type of batteries. Useful reading.
http://www.techrepublic.com/blog/tablets/how-and-when-to-charge-your-tablet-battery/814
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Pretty good link, thanks. And reinforces what I just said above.
Most any smartphone or tablet made in the past several years uses a Li ion battery. This confirms it: http://www.gsmarena.com/samsung_galaxy_note_8_0_n5100-5252.php
---------- Post added at 10:26 AM ---------- Previous post was at 10:21 AM ----------
hertsjoatmon said:
Although the battery life is of concern to me, the fact it charges via a micro USB input rather than propriatry cable alieviates that worry (looking at you Apple). I dont think I go anywhere where there isnt a charger available thanks to the amount of devices that use them.
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The charger for the Note 8 is 2 Amps, while most MicroUSB chargers (at least for phones and other small devices) are 1 Amp. Although this varies, and there are other tablet chargers that are also 2 Amps; but these are far less common than phone charges that just about anyone with a phone that isn't Apple will have.
What this means is that the 1 Amp charger will charge the Note 8 very slowly. I tried mine on a 1 Amp charger just once so far. Left it on for maybe an hour, and the charge only increased by a few percent.
So yes, you can charge with most MicroUSB chargers in a pinch. But it will be slow.
hertsjoatmon said:
Although the battery life is of concern to me, the fact it charges via a micro USB input rather than propriatry cable alieviates that worry (looking at you Apple). I dont think I go anywhere where there isnt a charger available thanks to the amount of devices that use them.
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Don't get the physical plug of a charger confuse you - I believe this tablet needs a 2amp output from the charger, meaning just because your charger has the same end connection, it won't necessarily help you charge this battery. I've had my users come to me thinking their devices are defective because they somehow started charging their tablet with their Bluetooth headset charger.
Someone also mentioned the black wallpaper that might help with the battery consumption - I believe that is only helpful on AMOLED screens that Samsung has used on other devices.
I'm really still on the fence on keeping it after I bought this - I'm coming from a GT 7.7 which had excellent build quality,screen, and battery life. The loss of the AMOLED screen for both graphics and battery efficiency is bothering me. I put both up side by side and feel disappointed that Samsung couldn't just make a JB updated 7.7 with new CPU, 2GB RAM, and stylus with the same design and beautiful Super AMOLED Plus screen. It's not even the price - but just feeling like I'm getting a somewhat inferior device (in a few but important aspects) from the 7.7, when it's supposed to be an upgrade to the older device.
I've seen the news about an upgrade to the 7.7 possibly coming, but will it come with the stylus that is also important to me and the other software enhancements from the Note 8?
Bagbug said:
dumbest thing wrote in this thread probably. You do not need to train or do a full charge. How come people still believe that nonsense in 2013 ??
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Click to collapse
Funny thing happened on mine.
The battery was VERY BAD the second day, but it could play live streaming for two hours when the battery was 1%. As soon as the tablet went off due to depleted battery, I charged it until it went all the way until the "full battery" came up.
After that, the battery is much better now, so don't say anything "dumb" or any nonsense because it works.
rEVOLVE said:
Someone also mentioned the black wallpaper that might help with the battery consumption - I believe that is only helpful on AMOLED screens
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That is correct, having a black background does not effect battery life on LCD screens.
On AMOLED screens, black pixels are actually not emitting light (while pixels displaying other colors emit light), which is why a black background will cause less battery drain than other colors.
On an LCD, the liquid crystal layer that depicts the colors is not itself a source of light. Its lit from the back, and the light intensity of the backlight is the same regardless of what color is being displayed. How much light is blocked or let though by the liquid crystal layer varies depending on their alignment (what color is being displayed). But this doesn't affect how bright the backlight is, anymore than pulling a window blind makes the sun burn less hydrogen.
Speedy Gonzalez said:
Battery life is great here after 5 cycles running it to 1% and recharging full at first it was draining faster but now I can watch 4 hours of netflix and still have 25% left nice thing is that the battery charges superfast so no worries
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Only four hours? My Nexus 7 averages about 10.5 hours of Netflix with 10% left. I wonder how other note 8's compare?
Sent from my Nexus 7 using xda premium