Related
Hi
has anyone ever tried out AA battery charger for O2 Exec, Qtek 9000,HTC Universal ?
I cannot imagine how this could possibly work with just one AA battery.
Same question for AA Battery Extender Charger
(If this has been asked/posted around, please point me to. I couldn't find it)
I personally have a 2x AA charger I bought in Japan. Does mini-USB.
Um, I can't say for certain, but it did charge my Dopod 900 from 18% to 20%, at which point the thingie broke down and stopped charging and instead did a rapid discharge on my phone... bringing it down to 11% before I pulled it out.
It doesn't seem to charge unless the phone is off beforehand, as well, as noted in a Motorola-charger thread somewhere else.
I tested it with the alkaline batteries that were provided with it; your mileage might vary with rechargeable lithium-ions. I'm going to try 2x 2000mAh ones when I get back to Singapore and scrounge up a bit of change; I'll report back then.
One of the pictures seems to put the USB charger in the wrong place.
Is there a Universal with the charger at the SD Card area or is it at the side?
Full voltage (100%) is around 4.2V, so charging the Universal I expect higher voltage, isn't it not correct?
1 normal battery is usually 1.5V and rechargable type is 1.2V. Seems like need 4 batteries?
Is there a protection circuit for over charging?
Mmmm, perhaps I can help here.
Premise, I haven't test any of the chargers you mention (but they seem interesting to me).
I'm not 100% certain of this, but, I'm quite sure that there's no universal with the charge bay near the SD; this is just a simple graphic error surely made by the Ebay user that place the ad togheter, most PDAs have their power in around there!
CWKJ is absolutely right when He says that battery voltage is 4.2V, now, if you were going to charge the universal "directly" battery to battery (this is not the way rechargeable batteries are charged), you would need at least the same voltage that has the battery to be charged (this is 4.2V).
Battery chargers are "a little bit more complicated", each battery technology requires some kind of "different" battery charger (Acid like Lead batteries used in cars or UPSs, NiCd, NiMh, LiPoly, LiIon, etc.).
Some chargers verify the battery's voltage, others battery's current, others battery's temperature, others several of them, others a special mix of changes related to several of these parameters, and so forth.
The chargers you're talking about in this thread are contructed with a special switch mode power supply, the type that boosts (raises) the input voltage, they'll work as long as the "donor" battery has enough power (expressed in W or A*V). Also this power supply has a "efficiency" (expressed in %), so not all the energy is tranferred to the charging battery.
It depends on charger's quality how well will it work and how much will it last, the situation mentioned by linj seems like a defective charger to me.
One last thing, usually these boost converters have been made with over current and over protection circuits, and I'm saying usually, because one of my car chargers burnt itself out without any reasonable cause but a defective/poor design.
See the price that you're buying and you'll (not neccessarily) end with a good approach to the charger's quality.
With such cheap price, I would expect it to be direct to direct charging and not completed Switch Mode Power Supply charging.
For the first one mentioned by JumpinS (the cheapest), the converter seems to be present, there's a detailed photo where some components can be seen, including a little inductor that's absolutely necessary to make the converter.
The other one has no such photos but being expensivier...
Hello everybody,
Since the best phone ever died (or better: drown) on me (HTC Universal OFCOURSE!). I had to look for a replacement and TP2 seemed like the best of bad things. LOL!
I noticed that the wall charger had a 5V -1A(mpere) output. My (standard) car charger has a 5V - 0,5 A output. So I got the notice "your current power supply... not enough ...close some ...."
Besides the fact that e.g. tomtom uses more than the charger can give, i was wondering :
is it BAD for my battery charging at 0,5A instead of 1A ?
how much A does a laptop give when charging my TP2 trough USB port?
HAs this got sth to do with the fact that in some programs there is an option like "do not charge while connected to PC?"
I know this is more of an offtopic question, but I hope there is somebody with enough electrical knowledge to help me out! I posted it also in the general section, but since it is an TP2 issue maybe it is better placed here.
Sorry for possible inconvenience!
THX!
Kjoere
Each USB port churns out 5V at 500mA max (i.e., 0.5A).
Thank you mesquire,
Do you have any idea what the effect is of charging with different AMpere?
E.g. my BT-earphone has 180mA - so better not charge this through laptop I suppose (too much is never a good thing) - but the otherway charging with less A, that I haven' got a clue ...
C.
You can face problems that it starts to charge, but stops after x minutes.
I have replaced my carcharger with the original HTC CC C100 which delivers 1Amp.
Never had any charging problems with that one.
Hi ronh,
replacing is ofcourse an option, but I was mainly wondering what the possible effects could be on the battery. On a Dutch site I found that Lithium-Ion batteries have no memory effect so all ampères below should be "theoretically" be ok.
Greetz,
C.
Curehead said:
Thank you mesquire,
Do you have any idea what the effect is of charging with different AMpere?
E.g. my BT-earphone has 180mA - so better not charge this through laptop I suppose (too much is never a good thing) - but the otherway charging with less A, that I haven' got a clue ...
C.
Click to expand...
Click to collapse
You can expect longer charge times through USB port than with the supplied charger.
A USB flash drive draws only about 100mA from the port, so the port should provide just enough power to charge your Bluetooth handsfree (but do make sure the device needs 5V to operate or you could fry it).
Hi mesquire,
thanx again, but I am still in the dark. You seem to make a difference between a USB port (500mA) and a USB flash drive (100mA), but i don't understand this (maybe my english isn't good enough ).
Do i understand you correctly is i say that the device connected also has sth to say in how much power comes out?
I thought the ampere is sth like a 'flow of current' and when more comes out than wanted by the receiver, it euh likes ... flood (too much current) the device (and does damage). Does this make any sense?
Ciao,
Kjoere
Your device will only pull the amount of amps required,
as long as the input voltage is the same you should be fine.
you will be OK to charge the phone at 500ma however this will take longer to charge,
I charge mine using my laptop regularly - that matches your car charger at 500ma,
you may find however, when using gps etc, that you are draining more power than being supplied by the charger and the battery will begin to discharge.
hope this makes sense,
Steve
Curehead said:
Hi ronh,
replacing is ofcourse an option, but I was mainly wondering what the possible effects could be on the battery. On a Dutch site I found that Lithium-Ion batteries have no memory effect so all ampères below should be "theoretically" be ok.
Greetz,
C.
Click to expand...
Click to collapse
they do have a memory, but the software/charger will not let you damage the battery.
anyway, assuming the battery can be charged at 1C (up to 2C is possible with some batteries, but can adversely affect battery life) you can theoretically charge the battery at a maximum of 1.5 amps safely. (assuming 1,500Mah battery)
TP2 doesn't have li-ion, it's a LiPo which doesn't have memory. They do have a limit on how many times they recharge as well as a shelf life, figure on buying a replacement every 1-2 years I'd guess.
fraser said:
TP2 doesn't have li-ion, it's a LiPo which doesn't have memory. They do have a limit on how many times they recharge as well as a shelf life, figure on buying a replacement every 1-2 years I'd guess.
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Click to collapse
are you sure ?? i went to the power settings and it says main battery: Li-ion
which i presume stands for lithium ion ?
Lithium Ion doesn't have memory.
Nickel Cadmium and Nickel MetalHydride have meory: i.e. if you charge it when it's at 70%, the next time it gets down to 70% it will think it's empty as it "remembers" that as the charging point.
With Lithium Ion you can charge them at any moment, ergo no charge. Adn they too have a life of about 500 charges.
fraser said:
TP2 doesn't have li-ion, it's a LiPo which doesn't have memory. They do have a limit on how many times they recharge as well as a shelf life, figure on buying a replacement every 1-2 years I'd guess.
Click to expand...
Click to collapse
The battery in my TP2 says LI-ION on the back, so perhaps some are LI-Po and some LI-ion? may go some way to explaining why some people are happy with their battery life and some not so.
Tom
Shouldn't really matter truth be told. As long as they have a rating of 1500mah they should last the same amount.
frogfoot said:
The battery in my TP2 says LI-ION on the back
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Click to collapse
Are you sure it doesn't say "Li-ion Polymer"? There is a distinction, particularly in cost!
fraser said:
Are you sure it doesn't say "Li-ion Polymer"? There is a distinction, particularly in cost!
Click to expand...
Click to collapse
my australian TP2 says Li-ion in big letters, and Li-ion Polymer in the fine print
The difference is in cost, and weight, but the end result in a cell phone or pda is more or less the same due to the low power demands.
My TP2 battery says Li-ion on the actual label itself.
thanx
rosebud said:
Your device will only pull the amount of amps required,
as long as the input voltage is the same you should be fine.
you will be OK to charge the phone at 500ma however this will take longer to charge,
I charge mine using my laptop regularly - that matches your car charger at 500ma,
you may find however, when using gps etc, that you are draining more power than being supplied by the charger and the battery will begin to discharge.
hope this makes sense,
Steve
Click to expand...
Click to collapse
Hi Steve,
Thx man! So now i Know i only have to worry about voltage. So I can charge my earphone in my car (which only wants 180mA) and my phone (1A). You are right that it sometimes (navigation, BT) uses more power than it gets (500mA), I get some message saying that by the way.
Any way thanx a lot !
Cureheaded
Let's kick that dead horse.....
My Pu16a battery dies at 39%. Tried the piece of tape thing, and the freezer thing (days apart) and it still cuts off at 39%.
So I fired up the 3200 mah extended battery that came with it (bought it from the marketplace here) and it won't charge above 40% most of the time. I can leave it plugged into my PC for 8 hrs overnight, or to my wall charger (not the OEM) and some times it will charge up to 56%, but 9 out of 10 days, it stops charging at %40. I even tried the tape thing with that battery too... no go.
SO I'm looking into purchasing a new battery(s) off the ebay internet machine, and was curious if anyone had experience with the 1750mah batteries that are supposed to be the same size as the pu16a battery. Check it out here
Anyone familiar with the PowerGen batteries? Check it out here
Recomend a good quality battery from a particular seller (or alternate source)?
I buyed the original battery from member duke nukem, he was a good seller and I´m quite happy with it
Adding a bigger battery to our big Universal is not an option for me, I prefer to carry a spare one on my bag.
thx orb. but it looks like they aren't really doing any business anymore (no items up for sale)
My pc (crappy celeron emachine, salvaged and resuscitated power surge victim) ends up haveing problems (usb mouse stays lit, but doens't respond) when I leave the phone plugged into USB for too long. Almost sounds like my phone is trying to draw more current than the usb port(s) can put out (mouse and printer are the only other usb items plugged in), as well as the Motorola Razr charger I have to use. Any thoughts on that?
Are you sure that duke nukem does not have them?
I remember seeing a post from him not too much time ago regarding Uni batteries
Have you contacted?
is he on this forum? I just checked and didn't find him here. I also checked ebay and he didn't have anything in his store...
i still have original 1620 mah batteries. The price is 22.95$ + postage. contact me at: [email protected]
1620 mah battery
Duke Nukem said:
i still have original 1620 mah batteries. The price is 22.95$ + postage. contact me at: [email protected]
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Click to collapse
how much would be the shipping cost? im from manila, philippines..
how many days would it take to receive the package?
Hello
I buyed a lot batteries for me and my universal owner's friends from ebay, sometimes 1750mAh but sometimes normal 1620. I never payed more than 8 € shipping cost includded for each. And almost all works fine. I think one new battery a year is acceptable. I love my old universal, and I carry with 3 more batteries in my bag.
From hong kong, china or japan, the batteries take about one month to reach my house.
By!
Would be nice if you post the links from where you buyed them in order to help others
So I know there are a couple of posts on here but I have found them a little hard to follow. I just got my captivate last sunday and on the stock 2.1 rogers rom I noticed that the battery life was very poor. Since then I am now running cog 3.01 i think and my battery life is now alot longer than before.
For the way I would like to use my phone It is still not enough for what would make me happy. my phone is unplugged at 6:00 am and when i get home by 5 it used to be dead but after "breaking in the battery" and the new rom i get home with about %15 percent battery.
I just bought a triple battery pack off of ebay for $10. these batteries are rated at 1500 mAh, the same as the battery that came with my phone. I am just wondering what I can expect from these batteries.
My plan is to drain two of them completely then leave them in my desk drawer(from what I have read if you plan on storing batteries they should be completely drained first) and use one of them plus my oem battery daily(until they start to lose performance). Again does anyone have any experience with a battery of the sort or any similar third party battery?
they are no where as good as samsung oem battery. even though it says 1500mah it is not or will drop drastically after a month or so of use...i've bought a lot of those batteries from ebay and they always like that even some other well known companies like Seidio do not compare with manufacture's batteries. the difference is usable capacity, oem batteries are around 95% compared to cheap chinese ones that are anywhere from 60-80%.
haha thanks that makes sense why they are so cheap, well i will probs by three new ones every months or so.
I have those ebay batteries. I bought the kit that comes with two batteries and an external charger for about $10.
The ebay battery is has about 60-70% of the power of the OEM battery. I have no real hard evidence just from using it for the past 2 months or so.
I am ok that it is does not last as long as OEM because it was only $10 and it came with the external charger. I love the external charger because it allows me to charge a spare battery while I keep one in my phone.
Saelee said:
I have those ebay batteries. I bought the kit that comes with two batteries and an external charger for about $10.
The ebay battery is has about 60-70% of the power of the OEM battery. I have no real hard evidence just from using it for the past 2 months or so.
I am ok that it is does not last as long as OEM because it was only $10 and it came with the external charger. I love the external charger because it allows me to charge a spare battery while I keep one in my phone.
Click to expand...
Click to collapse
I bought the same ensemble, with essentially the same results excepting perhaps that one of my replacement batteries seems to underperform with about 40% of OEM battery life.
That said, for $10... they're very handy as backups. They'll easily give you a few more hours in a pinch, which is essentially just what I was looking for. I really have no complaints in that respect.
The best strategy for battery life I've found is to buy a handful of wall adapters and position them in places you spend a lot of time at, and to develop a habit of plugging in when you're not moving around.
Sad but true, but mediocre battery life is just kind of a way of life for these (and really all) high-performance Android devices. Excepting getting an outsized and expensive battery replacement like the Seidio 3500 mAh that all but prevents use with many accessories and cases, a couple wall chargers and a car charger are effective if mildly annoying means of managing it.
These generic Hong Kong replacements are entirely effective as emergency supplements, but you'll find yourself preferring the OEM cell still.
Yep I mean for $20 I have two charges and 4 batteries so if I need to go without power , even if not a 100% match for the oem power, it is still damn cheap.
I also got one of these from ebay.
I got the 2x 1500mah batteries + Battery Charger combo.
I must say I am impressed. They are the same quality as my OEM battery. Its so convenient. I never have to run to a charger anymore. Just keep the spare battery in my car or wherever and just pop it in and carry on with my daily business.
When I get home, I just re-charge all the batteries. The Battery Charger even has an LED Light that tells you when its finished. "RED: while charging" and "BLUE: when finished". Charging takes about roughly 3 hours, (just like OEM).
Edit: Been using this for about a month so far. With no problems.. Its the best feeling. My phone is never plugged in anymore. And, I don't have to "pinch the settings" to make my phone last.
IE. lowering brightness to 10%, turning sync off, turning wireless networks off, etc.
HIGHLY RECOMMEND!
only crappy thing is??? I plan to sell this phone soon, when the Galaxy S 2 comes out, if the specs are good enough.
fluidd said:
I also got one of these from ebay.
I got the 2x 1500mah batteries + Battery Charger combo.
Click to expand...
Click to collapse
Would you mind posting the link or giving us the name of the exact vendor you ordered from?... I'm about to order the 2xbatteries and charger combo, but just want to make sure I get batteries that are half way decent. When I search on eBay I get about 20 vendors selling similar combos and given that in HK they're celebrating Chinese New Year... most won't fulfill orders until next week.
i wouldnt waste your money unless you just want an extra.
Like It
SEIDIO 3000mAh 3.7v
Plenty of power
@ Amazon, comes with new battery cover
Works like a dream $56.00
Easy to hold phone
HELL NO i'm not spending $56 on a battery
Got 2 new batteries and I want to keep them for a while, so I have a few questions:
1. Is the OEM fast-charge charger and cable okay to use every day, or will it degrade the battery faster than a slower/regular speed charger/cable?
2. Since I have 2 batteries now, which is the best way to charge them both up? charge 1 in the phone, then swap and charge the other in the phone? Or buy a battery charger (and if so, which one)?
3. Any other helps regarding the chargers and/or cables?Thank you for your help.
Faster charging will always generate more heat and put more stress on the battery, so slower charging would be better for a battery's lifespan, but I don't think you'll see a huge difference within two years.
By far the fastest way to keep going is having the second battery charged in an external battery charger and then swap when the other battery gets low, followed by charging the low battery in the external charger. Doing it this way also puts the least wear-and-tear on the phone's charging port since you'll rarely use it. I use LG's OEM external battery charging cradle (BCK-5200), but it may be hard to find nowadays. There's currently a used one up for sale in an auction by an American seller on eBay, and there are new ones from a South Korean seller for a higher fixed price. I wouldn't pay more than $25 for one. As for charging time, for me, it takes about 4 hours to charge my MaxxxJuice 4100 mAh batteries from ~5–10% to full. External chargers do not fast-charge, so you'll never put too much stress on the battery that way. Of course, swapping may not be for everyone as it may be inconvenient to take a case off and put it back on.
Unlike the older microUSB cables, bad USB Type-C cables that are not built to certain specifications can draw higher currents and destroy the devices they are charging. A few years ago, a Google engineer reviewed lots of USB-C cables on Amazon to give his view on those. If you need a third-party cable, make sure you get one from a reputable source with good reviews. My preferred USB cable is Anker's Powerline+ due to their extra strength/thickness, and I don't need much flexibility/twistability in my cables. Also, I like how the USB-C end connector is made of one single piece where you don't see any connecting lines around the middle (you can see an example here).
Other thoughts:
As long as there is a supply of extra batteries around and you can afford to buy them when the time comes, then you shouldn't worry much about how you charge your phone. In my opinion, that is one of the main selling points of having a hand-removable battery. I imagine a paranoid person on a phone with a sealed battery would be trying to keep the battery level between 40 and 80% at all times. So really, the only thing to worry about is having a decent USB-C cable and making sure the phone's charging port is clean and not worn out.
In case you are really interested on my detailed charging habits and related things on my V20, I discussed them while reviewing my batteries a while back on the V20 Subreddit.
Thanks!
C D said:
Faster charging will always generate more heat and put more stress on the battery, so slower charging would be better for a battery's lifespan, but I don't think you'll see a huge difference within two years.
By far the fastest way to keep going is having the second battery charged in an external battery charger and then swap when the other battery gets low, followed by charging the low battery in the external charger. Doing it this way also puts the least wear-and-tear on the phone's charging port since you'll rarely use it. I use LG's OEM external battery charging cradle (BCK-5200), but it may be hard to find nowadays. There's currently a used one up for sale in an auction by an American seller on eBay, and there are new ones from a South Korean seller for a higher fixed price. I wouldn't pay more than $25 for one. As for charging time, for me, it takes about 4 hours to charge my MaxxxJuice 4100 mAh batteries from ~5–10% to full. External chargers do not fast-charge, so you'll never put too much stress on the battery that way. Of course, swapping may not be for everyone as it may be inconvenient to take a case off and put it back on.
Unlike the older microUSB cables, bad USB Type-C cables that are not built to certain specifications can draw higher currents and destroy the devices they are charging. A few years ago, a Google engineer reviewed lots of USB-C cables on Amazon to give his view on those. If you need a third-party cable, make sure you get one from a reputable source with good reviews. My preferred USB cable is Anker's Powerline+ due to their extra strength/thickness, and I don't need much flexibility/twistability in my cables. Also, I like how the USB-C end connector is made of one single piece where you don't see any connecting lines around the middle (you can see an example here).
Other thoughts:
As long as there is a supply of extra batteries around and you can afford to buy them when the time comes, then you shouldn't worry much about how you charge your phone. In my opinion, that is one of the main selling points of having a hand-removable battery. I imagine a paranoid person on a phone with a sealed battery would be trying to keep the battery level between 40 and 80% at all times. So really, the only thing to worry about is having a decent USB-C cable and making sure the phone's charging port is clean and not worn out.
In case you are really interested on my detailed charging habits and related things on my V20, I discussed them while reviewing my batteries a while back on the V20 Subreddit.
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Click to collapse
On that Subreddit, you mentioned you cycled a couple batteries. Did you have to do the whole fully charge and fully drain thing each time you switched to the new battery, or just when you first bought the batteries?
Would like to know the answer to ^this^ as well.
baldybill said:
On that Subreddit, you mentioned you cycled a couple batteries. Did you have to do the whole fully charge and fully drain thing each time you switched to the new battery, or just when you first bought the batteries?
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pistacios said:
Would like to know the answer to ^this^ as well.
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Click to collapse
No, I only did the full cycle with the first battery three times, and that was it. The only reason to do that is for the Android software of the phone to get a better sense of your battery level. Of course, it won't be as accurate the longer you go swapping between batteries as undoubtedly they will differ a bit in capacity over time. But fully running down and then fully charging a battery isn't good for its lifespan if you do it too often. The only other times you'd have to really repeat the calibration is when switching to a battery with a different capacity or switching ROMs / doing a factory reset.
C D said:
No, I only did the full cycle with the first battery three times, and that was it. The only reason to do that is for the Android software of the phone to get a better sense of your battery level. Of course, it won't be as accurate the longer you go swapping between batteries as undoubtedly they will differ a bit in capacity over time. But fully running down and then fully charging a battery isn't good for its lifespan if you do it too often. The only other times you'd have to really repeat the calibration is when switching to a battery with a different capacity or switching ROMs / doing a factory reset.
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Click to collapse
So, I got a 4000 Powerbear that I'm calibrating now.
I'm also getting a 4100 Perfine.
Are they close enough that I shouldn't have to recalibrate for the 4100?
baldybill said:
So, I got a 4000 Powerbear that I'm calibrating now.
I'm also getting a 4100 Perfine.
Are they close enough that I shouldn't have to recalibrate for the 4100?
Click to expand...
Click to collapse
Most likely yes. I imagine most of these 4000–4300 mAh Lithium polymer batteries that started popping up this year are very similar, and some may just be rebranded from the same common factory source. Barring a defective battery, if the two batteries had a significant difference in capacity, you could see things like early shutdowns on the smaller capacity one or being stuck at a low percentage for an unusually long amount of time on the larger capacity one.
Great info.
So it looks like all other batteries on hand should not be put into rotation with the higher capacity batteries to avoid inaccurate readings in Android.
pistacios said:
Great info.
So it looks like all other batteries on hand should not be put into rotation with the higher capacity batteries to avoid inaccurate readings in Android.
Click to expand...
Click to collapse
Pretty much this. I suppose one could try keeping separate copies of the batterystats.bin file from /data/system when rooted and swap them alongside the different batteries. But that sounds like too much of a pain to deal with, even if it works.
C D said:
Most likely yes. I imagine most of these 4000–4300 mAh Lithium polymer batteries that started popping up this year are very similar, and some may just be rebranded from the same common factory source. Barring a defective battery, if the two batteries had a significant difference in capacity, you could see things like early shutdowns on the smaller capacity one or being stuck at a low percentage for an unusually long amount of time on the larger capacity one.
Click to expand...
Click to collapse
pistacios said:
Great info.
So it looks like all other batteries on hand should not be put into rotation with the higher capacity batteries to avoid inaccurate readings in Android.
Click to expand...
Click to collapse
C D said:
Pretty much this. I suppose one could try keeping separate copies of the batterystats.bin file from /data/system when rooted and swap them alongside the different batteries. But that sounds like too much of a pain to deal with, even if it works.
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Click to collapse
Just to add to this, I found your pics @C D for the charging instructions and there's a note about using 3200mah batteries along with the 4100mah batteries.
pistacios said:
Just to add to this, I found your pics @C D for the charging instructions and there's a note about using 3200mah batteries along with the 4100mah batteries.
Click to expand...
Click to collapse
Does that mean that if you switch between the batteries, they'll both last as long as they should (the 4100 longer time than the orig. 3200), but the system's percent will be wrong?
My understanding is that if you calibrate the phone to recognize the full 4100mah and then use a 3200mah battery, it will shut down early (but still use the full 3200mah).
Correct. They are warning you that swapping between batteries of significantly different capacities will throw off the accuracy of the phone's battery percentage indicator at all times, especially at the high and low percent values (so an early shutdown can happen when the smaller capacity battery is used). Of course, this won't affect either battery's true capacity.
I'd pay good money for a system that can correctly handle different battery capacities of any amount, but we all know where the future of hand-removable batteries has been heading for the last 3–4 years.
Does anyone charge their phone ONLY to 80 % or so?
If so, what apps do you use to limit this? Any other tips/advice?
baldybill said:
Does anyone charge their phone ONLY to 80 % or so?
If so, what apps do you use to limit this? Any other tips/advice?
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Click to collapse
I use AccuBattery and it has a notification sound that plays when you hit the target charge percentage, but it's still up to you to remove the phone from the charger or else it continues charging to 100%.
Since our phones have replaceable batteries, I haven't made any special effort to take care of them. I have a pair of May '17 OEM 3200 mAh batteries that are going to get switched out for a pair of new 4100+ mAh Li-Po batteries once I get my second V20 set up. Every charger I use is QuickCharge 3.0 certified except for USB on my PCs and my Pioneer Android Auto headunit USB connection in one car. The vast majority of the time, I charge via QC 3.0. Pretty much the only time I let the battery charge via PC USB is when I actually need to transfer files between the phone and computer.
Before my phone started having issues in the past month with a phantom power drain, I would let the phone charge from 30-40% to 80-90% and then remove it from the charger at night before going to sleep. In the last half year as the batteries have aged, I've let it get up to between 90-95% before unplugging. For the past month, I've been charging the phone four times a day from 40-100% to combat the power drain issue, but that comes with knowing that I don't care about these old batteries or the state of the firmware on this first V20 anymore.
As for when I swapped the two batteries I have, that entirely depended on when I actually ran one down so far that I needed a 0-100% battery swap, which could be months at a time and usually happened while on vacation or away from a charging source for a longer period of time than what my usual home/car/work routine allows.