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[Q] Battery charge problem

I have battery charge problem.
I charge (on USB) my NS about 7 hours (during I sleep), after wakeup I check charge status it was "Charged", after that I unlock and goto home screen to check battery again.It was 100% so after that I unplug charger.
The battery level was drop to 97% immediately.
Is my NS got hardware problem?
Thank you and sorry for my English.

Normal problem out it will be fixed soon
Sent From Your Mom's Nexus S.

i think ive read that it helps the battery last longer.
Also, ive been experiencing some other problems with charging my phone.
When its plugged into my wall and charging, instead of increasing battery percentage as it should, it will decrease in battery percentage, really strange. I'm not sure if its the battery or my charger? Anyone else experiencing this issue?

Did XDA NS have list of problem on 2.3.2 and 2.3.3
Sorry I found that forum

That 97% is a common problem? Man... I've been trying to recalibrate my battery the whole week...
They don't need to limit the charge to 97% to make the battery last longer. They can just lower the Full Charge limit without doing this awkward 3% drop after unplugging the charger.

thank you for all answer

Kel Ghu said:
That 97% is a common problem? Man... I've been trying to recalibrate my battery the whole week...
They don't need to limit the charge to 97% to make the battery last longer. They can just lower the Full Charge limit without doing this awkward 3% drop after unplugging the charger.
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My understanding is that this isn't a result of a lowered full charge limit but rather the way that LiOn batteries charge: once they reach full capacity they stop charging until they reach a bottom limit (Not sure what it is on the NS but on the Evo it was 90%) at which point they begin charging again. They do this because LiOn batteries do not absorb charge past 100% but they do absorb the heat from the charge. Over time this over heating can cause issues. There is another method of charging wherein the battery charges to full and then the amount of voltage is slowed but is continued. This method is called trickle charging and awhile back on the Evo it was all the rage until reports started to trickle in of batteries smoking or even catching fire due to overheating. Hence the reason why trickle charging is not standard.

Drained battery completely, can't charge or boot.

Trying to be a showoff, I decided to let my Blaze drain down to near-zero so I could get a screenshot of the battery stats page in CM. Unfortunately, it shut down when it hit "0" on the battery meter, and when I plugged it in to charge a few minutes later, it came up to the battery charge screen with the icon of the grey battery, and then shut off.
I can get it into clockworkmod and download mode while on AC power or plugged into my computer, but neither will charge it. Upon reboot while off AC or USB power, the Samsung logo flashes for less than a second and then shuts off. No CM boot animation whatsoever.
A voltmeter shows 3.65 volts on the battery, but I'm assuming the available amperage is extremely low and can't provide the required juice to boot it up completely. Any ideas would be appreciated.

boot into cm, backup and flash a different rom and see if it will charge
i had to do that with a droid x i bought off ebay, someone had flashed a version of miui that had a bug which caused it to think the battery was always full and wouldnt allow the phone to charge

namaui said:
A voltmeter shows 3.65 volts on the battery, but I'm assuming the available amperage is extremely low and can't provide the required juice to boot it up completely. Any ideas would be appreciated.
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Click to collapse
Amps is a measurement of current.
Voltage is a measure of the charge and 3.65 volts is still a good amount. The nominal voltage for the battery is likely to be 3.2v and you're nowhere near that. For example if it took about 3 hours to run the battery down from 4.2v (full charge) to 3.65v then you should be able to run the device for maybe a couple more hours before the battery is close to being drained.
[just a guess here]
The firmware does battery management. Shuts off the device when it thinks the battery is about drained and stops charging when it thinks the battery is at about full capacity. The software is probably out of sync with the physical state of the battery (calibration) and thinks the battery is at zero when it actually has plenty left. Or it has a bug. If you can't find an easy way to wipe/reset the calibration data then I'd go with the advice above and re-flash or flash something else.

Quick7135 said:
Amps is a measurement of current.
Voltage is a measure of the charge and 3.65 volts is still a good amount. The nominal voltage for the battery is likely to be 3.2v and you're nowhere near that. For example if it took about 3 hours to run the battery down from 4.2v (full charge) to 3.65v then you should be able to run the device for maybe a couple more hours before the battery is close to being drained.
[just a guess here]
The firmware does battery management. Shuts off the device when it thinks the battery is about drained and stops charging when it thinks the battery is at about full capacity. The software is probably out of sync with the physical state of the battery (calibration) and thinks the battery is at zero when it actually has plenty left. Or it has a bug. If you can't find an easy way to wipe/reset the calibration data then I'd go with the advice above and re-flash or flash something else.
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Thanks for the quick response, I think your guess was pretty accurate. An hour ago I cleared the battery stats in CWM, and after a few more battery pulls and reboots at the Samsung logo I left it alone while plugged into the AC charger. Came back 45 minutes later to a warm handset with a black screen and after holding the power button down for a good 15-20 seconds I booted normally into CM with a 12 percent charge.
Because I was able to get into CWM and download mode just fine (and run off battery for a few minutes), I was starting to think I broke CM. Glad I didn't get punchy and reflash.
And yes, you're right about amps, I was implying amp-hours with the wrong term.

[Q] CM10 not charging past 90%

I'm running the 12/28 CM10 nightly, and I'm having an issue with charging my battery. When the phone is on, the battery charges normally to 90%, at which point the LED changes from red to green, indicating full charge. If I leave it plugged in, the phone continues to charge to 100. However, the battery doesn't really charge past 90 because once I begin to use it the charge drops really quickly down to 90. Similarly, if I restart the phone, even if it said 100 before, when it is on again it says 90. I have had this issue with previous CM10 nightlies as well. It is a software issue, because if I turn the phone off and charge it, it charges to 100.
Any ideas on how to fix this? Thanks!

This is a suggestion out of the blue but maybe try recalrubratung your battery

omario8484 said:
This is a suggestion out of the blue but maybe try recalrubratung your battery
Click to expand...
Click to collapse
I did to no avail
Sent from my One X using xda app-developers app

A0A said:
I'm running the 12/28 CM10 nightly, and I'm having an issue with charging my battery. When the phone is on, the battery charges normally to 90%, at which point the LED changes from red to green, indicating full charge. If I leave it plugged in, the phone continues to charge to 100. However, the battery doesn't really charge past 90 because once I begin to use it the charge drops really quickly down to 90. Similarly, if I restart the phone, even if it said 100 before, when it is on again it says 90. I have had this issue with previous CM10 nightlies as well. It is a software issue, because if I turn the phone off and charge it, it charges to 100.
Any ideas on how to fix this? Thanks!
Click to expand...
Click to collapse
This is the intended bahavior. The type of battery used in phones last longest when they say between 80% and 20% of charged. So your phone will pull the maximum amount of power it can until it hits 90% then reduce power draw to a trickle charge.
The rapid drop is power is often the chip in the battery lying that it is fully charged when it is not. That is why you may see a rapid decline to 90% where your battery drain will go back to normal.
You might also see the phone telling you that it has 15% power then turning off. Upon reboot it will say it's at 0% or 1% that also is the battery trying to protect it self from damage.
This is a simplified explanation of how all phones work these days. The only difference you'll notice is how good the software is designed to lie to you about the power level. If it's good you won't notice these types of anomalies but they are still there.

Have you wiped battery stats?

dc211 said:
This is the intended bahavior. The type of battery used in phones last longest when they say between 80% and 20% of charged. So your phone will pull the maximum amount of power it can until it hits 90% then reduce power draw to a trickle charge.
The rapid drop is power is often the chip in the battery lying that it is fully charged when it is not. That is why you may see a rapid decline to 90% where your battery drain will go back to normal.
You might also see the phone telling you that it has 15% power then turning off. Upon reboot it will say it's at 0% or 1% that also is the battery trying to protect it self from damage.
This is a simplified explanation of how all phones work these days. The only difference you'll notice is how good the software is designed to lie to you about the power level. If it's good you won't notice these types of anomalies but they are still there.
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Click to collapse
Thanks for that informative answer. So I take it that means there would be no performance difference between turning my phone off, charging it, and then using it (with it saying 100%) vs leaving it on, charging it to 90% (green LED turns on) and then using it?

Stop charging at XX %

I spend a lot of the day with my phone tethered acting as a hotspot with unmetered data for my laptop, so the battery would drain very quickly if the phone was not plugged in. But at the same time, this means that I'm constantly plugged in and maintaining my battery at 100%, or if I return after a meeting or lunch, I'd be constantly charging from 80% back to 100%. I understand that both practices (keeping the battery at 100% and charging the last 20%) are not good for the battery. Since I usually have access to a charger, I don't really need to be charged to maximum battery capacity most of the time.
Is there any way to get the Pixel 2 XL to stop charging beyond 80% ?
Searches led me to https://android.gadgethacks.com/how...oid-device-avoid-excess-battery-wear-0176280/ That tells me to set /sys/class/power_supply/battery/charging_enabled to 0 to see if it charging stops.
But my Pixel 2 doesn't have /sys/class/power_supply/battery/charging_enabled. It has /sys/class/power_supply/battery/charge_disable instead, but setting this to 1 does not seem to stop charging. So it seems unlikely that Battery Charge Limit.apk would work. Does it work for anyone else?

This is wrong lithium-ion batteries are designed to be topped off, they last the longest staying above 30%.

My understanding is that these are not good for battery lifespan:
- charging the top 20%. I.e. charging from 80-100% uses up more charge cycles than 40-60%
- keeping the battery constantly at 100%. I.e. storing at 50% is better than storing at 100%
Are these inaccurate?
And, is there a way to limit charging to xx %?

Battery Charge Limit is closest to what what you're looking for - here's the main post.
https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002

When should you charge your phone?
"Leaving your phone on the charger all night (or all day) is far better for your*battery*than running it down and charging it up. 2.*Charge*a little bit whenever you can. Lithium-ion*batteries*don't respond well to being*charged*all the way up and then run all the way down."
May 26, 2015
http://www.popularmechanics.com/technology/gadgets/a15731/best-way-to-keep-li-ion-batteries-charged/

Need help, weird battery problem

Hi everyone, im having a problem with this phone:
1- Charging the phone never reach 100% in one charge, it always stops charing at a random number, for example 70%, no matter how much time i let the phone charging it never goes past that. The solution is unplug and plug again, then it reaches 100%.
2- The number 1 is not a big deal but this is. The phone automatically turn off at a random number again, let say 66%, and i cant turn it on. If i connect the phone to the charger it says 0% battery. Is not like the % freezes at 66% and i use it all day and then turn off. For example, i have the phone at 100%, i start using it and i see the % going down like normal and after an hour or two of using it suddenly turn off and im not able to turn it on again because the battery is at 0%.
I tried:
Hard reset, wiping cache, data.
Hard reset, wiping cache, data and installing the latest stock rom.
New battery.
Different charger.
I have no idea what else to try, anyone have a clue?
Thanks!

I think the battery is broken, also had the problem. Then I bought me one on Ebay for 9,99€ and now everything is good again.

Try using a -known- good cable and charger.
Make sure the port contacts are clean and debris free. Always charge with screen off.
You can also try powering the phone off and see if this alters its charging pattern.
My best guess...
When it auto shuts down again pull the battery and measure its actual voltage to determine if it's at about 6%.
If actual voltage indicates it's at 6%* may be a bad battery (limited capacity) or a hardware failure (shutting the charge cycle down prematurely).
If battery actually has 20% or higher when the phone shuts down) it indicates a hardware failure in the phone.
If battery temp exceeds about 102°F during charging the phone will abort the charge; make sure this isn't the cause. A hot charging battery in a cool room could indicate a battery or hardware failure. If battery temp exceeds 107°F or so in operation the phone may also auto shutdown.
Excessive cold (>32°F) will effect battery capacity severely.
Don't charge a cold Li battery (under 70°F).
Never charge if at or below freezing**.
Li's like a charge temp range of 80-95°F
They prefer frequent, short mid range charge cycles (40-65%) vs topping them off beyond 80%
*hunt down the voltage/% charge for this battery
**can cause Li plating which will permanently degrade the cell