Develop Bugs

galaxy nexus battery questions.

everyday when I use the galaxy nexus my routine is.
before I sleep, I plug my phone to my phone charger and I pull it out after I wake up. so its basically charging for about 5-7 hours on average.
is this decreasing my battery life? because ever since I had the nexus, I did this and I have never had battery life compared to what people post on xda despite trying out roms/kernels.
so that was my first question.
my second question is, is flashing like getting a new device? after I flash, is the battery life suppose to be bad?
I constantly flash almost every other day and I'm not sure if this is the reason my battery life is so bad.
am I suppose to use my phone for couple weeks before I get good battery life?
btw. I have a cdma galaxy nexus .thanks
Sent from my Galaxy Nexus using XDA App

1°) Is battery life reduced after long charging? This is a good question. I have no proof on that point but I think so. Continuing to keep current going through the battery once fully charged does not improve the battery capacity. The analysis I made on several smartphones shows that some of them stop the current while fully charged ( for example HTC touch Cruise) but most of them keep a charging current.
Samsung smartphones are difficult to analyse because they do not give any data on the current going through the battery
2°) Battery calibration will not improve the battery capacity: Once the battery capacity has been reduced, this is due to chemical changes in the battery, there are no way to repair it. What we could expect is to remove the battery shutdown artefact by adjusting internal parameters of the battery control circuit, so that the state of charge calculus will be more accurate again.
Some more details are given here: http://78michel.unblog.fr/htc-desire-battery-shutdown-analysis/ and in some other pages on this blog

7_michel said:
1°) Is battery life reduced after long charging? This is a good question. I have no proof on that point but I think so. Continuing to keep current going through the battery once fully charged does not improve the battery capacity. The analysis I made on several smartphones shows that some of them stop the current while fully charged ( for example HTC touch Cruise) but most of them keep a charging current.
Samsung smartphones are difficult to analyse because they do not give any data on the current going through the battery
2°) Battery calibration will not improve the battery capacity: Once the battery capacity has been reduced, this is due to chemical changes in the battery, there are no way to repair it. What we could expect is to remove the battery shutdown artefact by adjusting internal parameters of the battery control circuit, so that the state of charge calculus will be more accurate again.
Some more details are given here: http://78michel.unblog.fr/htc-desire-battery-shutdown-analysis/ and in some other pages on this blog
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Click to collapse
thanks for the answer to questions1.
but I think I may have written question number 2 in a bad way which was not what I intended. I did not mean to ask if battery calibration increased battery life.
most people already know that it does not.
what I am asking is if battery life is suppose to be calibrated(?) right after you flash a new rom or kernel.
I asked this because I flash a lot and don't get good battery life. I'm not sure if its my device that is the problem or the constant flashing that causes this.
I have currently stopped flashing for 2 days now so I will report back if that was the problem.
anyways thank you for the reply
Sent from my Galaxy Nexus using XDA App

To answer question 2, you do not need to calibrate the battery and flashing roms does not consider your battery bad. The community here does have different opinions on calibration but it wasn't too long ago I read an article where google devs came out and told everyone this isn't really needed.
I have had a droid incredible and now the gnex, and have flashed numerous roms. I have never calibrated my battery and typically experience pretty good battery life AFTER I have played with the phone and set it up and stopped turning on the screen ever 2 minutes

To answer question #1:
The battery is a Lithium Ion battery. Lithium Ion batteries like to be charged. You should keep them above 10% as often as possible and ideally plugged when ever you can. These types of batteries last longer with a constant charge than with out, the full "Drains" kill Lithium Ion batteries faster and should only be done when you are calibrating the device (on the first charge or two).
The confusion comes from the old rechargeable Nickel Cadmium batteries which lasted longer if you did a full charge and discharge as these had a "memory".
As far as question #2 goes that is personal preference. I have flashed my GNex 6 or so times now and have had no issues when I didn't re-calibrate it.

x942 said:
To answer question #1:
The battery is a Lithium Ion battery. Lithium Ion batteries like to be charged. You should keep them above 10% as often as possible and ideally plugged when ever you can. These types of batteries last longer with a constant charge than with out, the full "Drains" kill Lithium Ion batteries faster and should only be done when you are calibrating the device (on the first charge or two).
The confusion comes from the old rechargeable Nickel Cadmium batteries which lasted longer if you did a full charge and discharge as these had a "memory".
As far as question #2 goes that is personal preference. I have flashed my GNex 6 or so times now and have had no issues when I didn't re-calibrate it.
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so are you saying that its good to keep my phone plugged in while I sleep?
Sent from my Galaxy Nexus using XDA App

bluemoon1221 said:
so are you saying that its good to keep my phone plugged in while I sleep?
Sent from my Galaxy Nexus using XDA App
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Click to collapse
Yes. Because of the way it the chemical reaction works it is better to keep it charged (plugged in at night).

x942 said:
Yes. Because of the way it the chemical reaction works it is better to keep it charged (plugged in at night).
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ok thanks for the explanation
Sent from my Galaxy Nexus using XDA App

Li-ion batteries decreases in capacity over time NO MATTER WHAT YOU DO. (even if you don't use it)This is the down side in exchange for easy maintenance and high energy density.
In short, just use it normal, charge it when it gets low and stop worrying about the battery life.

bluemoon1221 said:
what I am asking is if battery life is suppose to be calibrated(?) right after you flash a new rom or kernel.
I asked this because I flash a lot and don't get good battery life. I'm not sure if its my device that is the problem or the constant flashing that causes this.
Click to expand...
Click to collapse
I am not so clever with my English so I have not fully understood your 2nd question.
Flashing a new rom involve only the smartphone. Calibrating the battery is changing data stored inside the battery IC's memory.
These are two ''independant'' processes. The only relationship between them is that the some roms allows you to write in the battery memory and some others doesn't

What's average battery life you guys are getting with mod use ( variable term)?

x942 said:
To answer question #1:
The battery is a Lithium Ion battery. Lithium Ion batteries like to be charged. You should keep them above 10% as often as possible and ideally plugged when ever you can. These types of batteries last longer with a constant charge than with out, the full "Drains" kill Lithium Ion batteries faster and should only be done when you are calibrating the device (on the first charge or two).
The confusion comes from the old rechargeable Nickel Cadmium batteries which lasted longer if you did a full charge and discharge as these had a "memory".
As far as question #2 goes that is personal preference. I have flashed my GNex 6 or so times now and have had no issues when I didn't re-calibrate it.
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Click to collapse
remember 10% is not 10% displayed charge. 0% is about 25% as manufacturers take into consideration battery technologies when designing them. it is also quite dangerous to charge from 0-20% on a Lion battery as the chemical reaction has to be reactivated. and over charging can cause a fire.
All calibrating does is make the battery indicator more accurate, it doesn't increase the charge, the supplied chargers and phone tech will not allow overcharging, and the phone will not discharge a battery to below 25% as battery discharge below 25% will damage the cells.
if you are interested look into Lion charging in the RC world. we need balancing boards with controllers when charging multiple cells, and we have to put them in fire bag just in case. it will give you a greater understanding of how lion and charging works.

monkeypaws said:
What's average battery life you guys are getting with mod use ( variable term)?
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Click to collapse
Mine is pretty bad. I max out at 10 hours I'm trying Apex rom now hoping it will be better. Something tells me I need an extended battery.

7_michel said:
I am not so clever with my English so I have not fully understood your 2nd question.
Flashing a new rom involve only the smartphone. Calibrating the battery is changing data stored inside the battery IC's memory.
These are two ''independant'' processes. The only relationship between them is that the some roms allows you to write in the battery memory and some others doesn't
Click to expand...
Click to collapse
Exactly right. And our nexus does not give us any access to the chip inside the battery, so there is no need to do any type of calibration with this phone. No roms can change this either due to the max17040 fuel gauge chip inside our batteries.

bluemoon1221 said:
what I am asking is if battery life is suppose to be calibrated(?) right after you flash a new rom or kernel.
I asked this because I flash a lot and don't get good battery life. I'm not sure if its my device that is the problem or the constant flashing that causes this.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
You got confused here. You are not calibrating the battery but how the OS interprets the battery data. The battery itself DOESN'T get calibrated. (And you cannot break a battery by flashing ROMs)
There's really nothing much you can do about the capacity of the battery itself as a normal user once it's been made in the factory.

monkeypaws said:
What's average battery life you guys are getting with mod use ( variable term)?
Click to expand...
Click to collapse
my battery seems to be only capable of 2 hours of screen time despite using 3g/wifi, no nfc, no bluetooth, no sync, etc.
but I can still live with it.
Sent from my Galaxy Nexus using XDA App

diablous said:
remember 10% is not 10% displayed charge. 0% is about 25% as manufacturers take into consideration battery technologies when designing them. it is also quite dangerous to charge from 0-20% on a Lion battery as the chemical reaction has to be reactivated. and over charging can cause a fire.
All calibrating does is make the battery indicator more accurate, it doesn't increase the charge, the supplied chargers and phone tech will not allow overcharging, and the phone will not discharge a battery to below 25% as battery discharge below 25% will damage the cells.
if you are interested look into Lion charging in the RC world. we need balancing boards with controllers when charging multiple cells, and we have to put them in fire bag just in case. it will give you a greater understanding of how lion and charging works.
Click to expand...
Click to collapse
Thanks for that! Didn't know it displayed it differently. I only know how the chemical reaction works and such.

NP fella, thing is Lion is new tech and people still see it by the standards of older battery tech so it's taken for granted that 0% is 0%, and 100% is 100%. where this wouldn't be possible as too many issues would crop up. in RC racing we basically learn it inside out, as Battery types are better for different things. Endurance racing needs Ni-Cad as i prefers a sustained drain and will slow the car near the end of the charge, but keep going with reduced acceleration, while Ni-MH batteries are good, as they have better acceleration due to there properties, but suffer from being fine and suddenly suffering poor acceleration, you have no warning like the last lap. While Li-on are brilliant for one and off acceleration like sprints, or twisty tracks, but run at max power right til the end then just stop dead.

TurboPower 30 NOT charging faster than Turbopower 15. What's going on?

Hello all,
The recent discussions on xda and r/rMoto_Z about battery chargers and questions concerning whether or not a TurboPower 30 charger is it worth it to us Z Play users prompted me to do a quick test comparing the chargers.
What I found is my TurboPower 30 is not charging any faster than the TurboPower 15 that came with the phone. I am using tasker (I'm a tasker noob BTW) to log the time and battery level to a Google Sheet upon a change in battery level. I discharged the phone to 14% both times, shut it down, let it cool, turned it on, then plugged in without touching it during the charging process.
Overall, both chargers behave the same. Both charge at a rate around 1.1% to 1.15% charge per minute until the 90-92% mark, where they slow down drastically.
The TP15 took 90 minutes to charge, while the TP30 took 95 minutes to charge.
So what's going on here?
Is my phone malfunctioning?
Is my charger(s) malfunctioning?
Am I stupid and/or missing something?
Can the Z Play even make use of the extra amperage from the TP30?
I'm at a loss here. I could have sworn the TP30 seemed faster, but maybe not.
Can anybody else confirm the same behavior from their chargers?
I can provide a link to a graph and the google sheet itself once I get past the 10 posts required before posting outside links.

I have the Z Play and the Z Force. Using the 30 watt charger on the Play still only charges it at about the same rate as the 15 watt charger. Not sure of the reasons just saying the results I have gotten.

Motorola probably put a limit on that

Charging from 30% to 50% took just a few minutes but phone got really really hot... I'll stick to charging with my 10w ipad adaptor... Decently fast and phone stays cool :good:

TurboPower 30 i guarantee only reaches 30 watt output over 12 volts. Our phone only accepts 5v at 3 amps max (you can force it, but you will probably ruin a component). This is due to thermal restrictions and to help preserve the battery from degrading faster than normal due to heat. With my moto x pure I recieved a turbopower 25 which charged my phone (which is about the same size as this one) at 12v ~2.1 Amps and the phone was already thermal throttling while charging. With a phone that lasts 2 days already Lenovo probably figures you can top your phone off when you have time to, and even then charging at 15 watts is still pretty quick if you really need to charge your phone in a hurry. More power going in = more heat put out due to inefficiencies. This will change whenever we get superconductors figured out and can have ~100% efficiency, but that will (probably) take a while, and even then take longer before it trickles down to consumer products.

jon7701 said:
TurboPower 30 i guarantee only reaches 30 watt output over 12 volts. Our phone only accepts 5v at 3 amps max (you can force it, but you will probably ruin a component). This is due to thermal restrictions and to help preserve the battery from degrading faster than normal due to heat. With my moto x pure I recieved a turbopower 25 which charged my phone (which is about the same size as this one) at 12v ~2.1 Amps and the phone was already thermal throttling while charging. With a phone that lasts 2 days already Lenovo probably figures you can top your phone off when you have time to, and even then charging at 15 watts is still pretty quick if you really need to charge your phone in a hurry. More power going in = more heat put out due to inefficiencies. This will change whenever we get superconductors figured out and can have ~100% efficiency, but that will (probably) take a while, and even then take longer before it trickles down to consumer products.
Click to expand...
Click to collapse
Actually, the TurboPower 30's max output is 5v @ 5.7a, hence the large fixed cable.
Motorola lists the TurboPower 30 as compatible with all Moto Z devices. I took "compatible" as meaning I will receive the full output on a Z Play. If that's not the case, then Motorola should specify as such. I mainly just want to find out if my issue is by design or isolated to me.

l3rewski said:
Actually, the TurboPower 30's max output is 5v @ 5.7a, hence the large fixed cable.
Motorola lists the TurboPower 30 as compatible with all Moto Z devices. I took "compatible" as meaning I will receive the full output on a Z Play. If that's not the case, then Motorola should specify as such. I mainly just want to find out if my issue is by design or isolated to me.
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Click to collapse
Surprising that its actually at 5 volts tbh, since manufacturers were moving to 5, 9, and 12 volt standards for quick charging (not sure why the higher voltage instead of higher amperage). It would be by design though as the thermal restrictions still stand. The phone would have a hard time disipating all the heat generated (unless you suspended it by a string in mid air and had a fan blow on it :laugh and it could degrade the battery faster (due to heat). It is technically compatible in that will charge the phone and quick charge it at 15 watts, but it will not go up to 30 watts. It could be useful in the future when more laptops have thunderbolt 3 or 4 ports and you could use it for that .

jon7701 said:
Surprising that its actually at 5 volts tbh, since manufacturers were moving to 5, 9, and 12 volt standards for quick charging (not sure why the higher voltage instead of higher amperage). It would be by design though as the thermal restrictions still stand. The phone would have a hard time disipating all the heat generated (unless you suspended it by a string in mid air and had a fan blow on it :laugh and it could degrade the battery faster (due to heat). It is technically compatible in that will charge the phone and quick charge it at 15 watts, but it will not go up to 30 watts. It could be useful in the future when more laptops have thunderbolt 3 or 4 ports and you could use it for that .
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Click to collapse
So what specifically in the design of the Z Play creates thermal restrictions greater than that of the Z Force? And what makes you believe the TurboForce 30 charger will charge other devices at ~30w? Is it a USB Power Delivery spec charger?
Regardless of all this, I still find the product description disingenuous. I would have simply gone with a standard (and cheaper) 15w USB-C- charger had I known this.

l3rewski said:
So what specifically in the design of the Z Play creates thermal restrictions greater than that of the Z Force? And what makes you believe the TurboForce 30 charger will charge other devices at ~30w? Is it a USB Power Delivery spec charger?
Regardless of all this, I still find the product description disingenuous. I would have simply gone with a standard (and cheaper) 15w USB-C- charger had I known this.
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Click to collapse
It is disingenuous to an extent, they didnt lie to you when they said it would work, but they just didnt tell you that it wouldnt charge at the full 30 watts (maybe there was an asterisk for it?). From the little bits of research I did on the moto Z force forum, it seems that it does follow USB-PD, but I dont know much about USB-PD specs or Qualcomm quick charge specs honestly. The only real advantage the Z force has in terms of helping with heat disipation is the aluminum backplate it has vs our glass backplate, it could also have some extra copper inside of it to help spread the heat around as well. Aluminum transfers heat better then glass does which allows it to have more wiggle room in terms of thermal restrictions, but I bet you the phone still gets really hot while turbo charging especially at 30 watts. Since it seems to follow USB-PD spec that would mean that if another device that follows that spec (a laptop with USB type-c thunderbolt 3?) and requests that much power then yes, it should work.

and then, what is the exact charger for Moto Z2 Force ? 15 (included in package), or 30 ?

Best way to use battery mods...

So I am curious how people are using their battery mods? I have a Tumi that came with my phone (swappa). I am grateful to have it though I realize it may be unneeded with the Z play. I was surprise the first time I used it to notice the phone does not sleep with the battery mod on. Is this normal? It correctly kept it at 80% for most of the day but I believe it probably wasted quite a bit of energy doing it.
Another thing I was surprised at was how HOT the MZP got when I charged it with the turbo charger. It was fast! I am curious at what cost this speed comes at. I am tempted to leave the battery mod on and charge wirelessly over night. This would be a much slower charge and possibly better for the phone's battery. I have had bad luck with batteries going bad and I would like to care for this one the best way possible. Would this be be better than just running a turbo charge for an hour each morning before leaving the house? I expect the phone will last the day without the battery mod without problems.
Anyway... I am curious to hear how others are managing their battery and using the battery mods in you have one. I am sure I can learn a thing or two. Also, any research on if turbo-charging decreases the life of the battery? I know they are designed for it, but they are also designed to last a little over a year. Moto won't be upset if I have to buy a new phone in two years. Thanks for the conversation!

Despite of what the research articles on Internet says, I have stopped plugging in my devices overnight on regular basis after I have had my share of bad luck with swollen batteries. I don't have a battery mod for my z play but I try to care for my battery as much as possible. Since phone gets charged in less than 2 hours with turbo charger, I generally charge it in day time or before going to bed. If I am at home and I am not in a hurry, I use a normal charger to charge my phone. It's well known that heat the known enemy of batteries and whenever I plug in turbo charger, my phone gets hot. Highest is 42 degrees only though ( ambient environments plays a role). As summers are approaching here, I simply switch on the fan whenever I charge using turbo charger.
Though turbo chargers are designed to charge fast acconpnained by the compatible chipset, I highly doubt that companies had some real progress in lithium batteries and they are not meant to be tinkled like that so I am a bit sckeptical regarding long term battery health when constantly used with turbo chargers.
Sent from my XT1635-02 using Tapatalk

How to preserve the battery over time?

Hi;
From JerryRigEverything's Teardown video I can tell that is not easy to replace the battery on the G7 plus if would void the water resistance and since I'll keep this phone for at least 2 years I have the following question about how to preserve the battery in the best conditions possible:
In order prevent the battery degradation, is it better to use: Fast or Wireless Charger?
Do you have any other advice regarding this topic?
3000 mAh isn't that great to begin with and if you add that it could get worse over time then it's better to take precautions. I wouldn't care that much if replacing the battery wasn't that hard. I mean it would require a good technician in order to get a proper reparation and I'm not sure I know one.
I apologize for the spelling or grammar mistakes, I'm not a native speaker and I'm still learning.

Charge whenever you can and dont let it go under 50%
The more you discharge it the chorter lifespan it get

Disable all crap you do not use.. When at home, and phone not used much. Turn off Wifi, BT, Location and even Data..

maydayind said:
Charge whenever you can and dont let it go under 50%
The more you discharge it the chorter lifespan it get
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Click to collapse
According to what I've read. I think the ideal scenario would be mantaining the battery charge between 20% and 80%.

doubledragon5 said:
Disable all crap you do not use.. When at home, and phone not used much. Turn off Wifi, BT, Location and even Data..
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Click to collapse
Yes. That's exactly what I do with every smartphone I've own. I usually go heave on optimization of every single aspect regarding performance and battery life.
I use WIFI on, Data off, BT off, location off, auto brightness setting, Always on display off, no facial unlock, WhatsApp tweak to get only important notifications, the display is set down to 1080p instead of 1440p. When I play PUBG mobile I turn on Airplain mode and plug in headphones.

I purchased Acubattery. It has alarms that let you know if you are overcharged (more than 80% it says).
It also does a really good job of monitoring your current capacity and giving your hints on what is draining your device during the day. It will estimate your current battery capacity, which is nice if your phone shows they battery condition as Good (whatever that means Huawei Nexus p6).
Basically your battery is going to self destruct, but I find this app really gives you a good amount of information to make good decisions about how you use your phone.

I disagree with every advice here!
Check out my thread from my last phone :
https://forum.xda-developers.com/xz...ry-restore-t3796461/post76653346#post76653346
Been reading dozen of threads on diffrent forums regarding people complaining about their poor battery health, performance, etc.
Here are my advices to obtain near 100% battery health as years passes by (I have an galaxy s3 from 2012 with 90% and an LG g3 dual sim from 2014 with 92% ???), it all has to do with user behavior:
1. Avoid not charging to at least 95% then discharging it to near 0% (example: you charge it from 0 to 50 then you go outside and discharge it to near 0)
2. Avoid high usage for more than 3 consecutive days.
3. Drain SLOWLY from 100 to 0 once a week. This drain must be done at least in 1,5 - 2 days.
4. Charge from 0 to 100 with phone off at least 1 time / week
5. Every 2 weeks Let the phone discharge in 2-3 days, with minimal use, like just calling.
6. Repeat nr. 3 as much as you can
7. Avoid putting to charge when the phone is hot.
8. Avoid charging while using the phone.
9. Avoid fast charging.
10. From 100 to 70 and from 30 to 10 go slowly.
11. Never let it discharged 5, 10, 20 % more than 1 day
12. Never charge from 20, 30 to 100.
And many more will come.
Cheers.
??????

joser0913 said:
Hi;
From JerryRigEverything's Teardown video I can tell that is not easy to replace the battery on the G7 plus if would void the water resistance and since I'll keep this phone for at least 2 years I have the following question about how to preserve the battery in the best conditions possible:
In order prevent the battery degradation, is it better to use: Fast or Wireless Charger?
Do you have any other advice regarding this topic?
3000 mAh isn't that great to begin with and if you add that it could get worse over time then it's better to take precautions. I wouldn't care that much if replacing the battery wasn't that hard. I mean it would require a good technician in order to get a proper reparation and I'm not sure I know one.
I apologize for the spelling or grammar mistakes, I'm not a native speaker and I'm still learning.
Click to expand...
Click to collapse
There are so many things that could affect your battery life over a 2yr period. I own both the G6 and G7 and the G6 still gives me pretty good standby and SOT after 2yrs.
General rule says you avoid fast charging wherever possible as this will affect battery over the long run. Avoid scenarios wherein the battery might overheat.
Also little things like simply living in an area with bad coverage will eat through your battery like nothing else.
If your worried about battery replacement, im fairly sure LG service centres do it for a pretty resonable price anyways.

Diagnose Batteries Health, Type of Charger to keep Tablet always on

Hi, somehow my Tablet is taking really long to charge (even with more high powered chargers). But the battery seems to last the same. Any suggestions how could I test the batteries health?
Also I'm planning to use the tablet as a check in point (also constantly playing video). Screen should be kept with maximum brightness all the time. What type of charger do you recommend for preventing any battery drainage?
Best regards,
Carlos M.

camontellano said:
Hi, somehow my Tablet is taking really long to charge (even with more high powered chargers). But the battery seems to last the same. Any suggestions how could I test the batteries health?
Also I'm planning to use the tablet as a check in point (also constantly playing video). Screen should be kept with maximum brightness all the time. What type of charger do you recommend for preventing any battery drainage?
Best regards,
Carlos M.
Click to expand...
Click to collapse
Perhaps a tester like this can help to find out more.