Develop Bugs

[Q] Mysterious Battery Issues

Hey all.
I have my LG Opt. G Pro E986 on Stock Firmware. It's rooted and has this Kernel http://forum.xda-developers.com/showthread.php?t=2363330.
Overall I'm ok with my battery life, around 2 days of usage with 6 hours screen-on time. Standby time is very good.
My problem is the following:
If my phone is around 30% battery it starts to drain a lot. I don't even have to use it and it's empty within 3-4 hours. The power consumption at this point is immense and i can't figure out why, there is nothing I am doing different than normal use. I even try to use it as less as possible at this battery level, but it just keeps going down.
I have Quad-Core management always on, power saving mode always off. I also do not have any other power saving applications or settings running.
Processor is on stock clockspeed, Voltage is on stock too, no Cores are disabled.
I searched for draining apps via Battery Stats Plus but did not found anything.
Useless Tasks/Processes etc. are disabled via App Quarantine.
I have this problem for a long time and now decided to ask for help.
Does anyone have the same problem? Can someone help my fix this issue?
Thanks a lot.

I see it too on stock battery but not on the zerolemon 3150 mah battery...it seems related to the way the phone measures battery %ge for the stock battery I guess
Sent from my LG-E980 using Tapatalk 4

Well ok, if this is the case is there any way to fix it without buying a new battery?
I ordered one with 3800 mAh, but it was crap and didn't even last half as long as the original one, so i wasn't able to compare them regarding my problem.

[Q] Terrible with battery percentage incorrect.

Hello.
My device is GT-N5100 with a custom KK TouchWiz based ROM
I have terrible with battery percentage meter incorrect.
Sometimes charging form 30% to 60% it's suddenly jump to 100% but still charging for a long time may be long than 1 hour to show battery full.
And sometimes with discharge ,battery percentage meter show much than 16% then suddenly depleted battery to power off itself.
I also ever face this issue from stock KitKat.
Any way to fix it ?

Same problem her
memooffon said:
Hello.
My device is GT-N5100 with a custom KK TouchWiz based ROM
I have terrible with battery percentage meter incorrect.
Sometimes charging form 30% to 60% it's suddenly jump to 100% but still charging for a long time may be long than 1 hour to show battery full.
And sometimes with discharge ,battery percentage meter show much than 16% then suddenly depleted battery to power off itself.
I also ever face this issue from stock KitKat.
Any way to fix it ?
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Click to collapse
Hi, Yes I have this same problem. Don't know why it happens and don't know how to fix it. Charging for a long time and very little % increase leave it for a little while longer and it pops up to 100%. No idea why it does this.

I have the same problem, I have already rooted my device and tried some apps to recalibrate It but useless

A battery pull (I.e. disconnect the battery for 15-60 mins) will help reset the fuel chip, but the issue with incorrect calibration will eventually return over time. Rooting the device, installing Xposed and the Wanam Xposed module and disabling Dynamic Voltage Frequency Scaling (DVFS) once you've performed the battery pull helps a lot to prevent the issue from returning. Deleting Battery Stats does absolutely nothing.
Sent from my GT-N5110 using Tapatalk

rtiangha said:
A battery pull (I.e. disconnect the battery for 15-60 mins) will help reset the fuel chip, but the issue with incorrect calibration will eventually return over time. Rooting the device, installing Xposed and the Wanam Xposed module and disabling Dynamic Voltage Frequency Scaling (DVFS) once you've performed the battery pull helps a lot to prevent the issue from returning. Deleting Battery Stats does absolutely nothing.
Sent from my GT-N5110 using Tapatalk
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Click to collapse
Thank you very much for your suggestions.
I ever disconnected battery two times but it can not help just little different (before disconnect battery 50% after connected increase to 67%)
I will try Xposed module to disabling Dynamic Voltage Frequency Scaling and I will report you back.
I hope it will be better.

Your battery is dying. Change it to a new one. Buy a new one off ebay & do it yourself, its fairly easy.

His battery *could* be dying, but a bunch of us with Note 8s have encountered the same issues with reported battery voltages jumping all over the place resulting in the fuel chip thinking that, on average, it has 40% less juice before it thinks it's empty and dies. The net result is that many people are getting 3-4 hours of battery life, rather than the 7-10+ hours they should be getting. Someone on these forums tracked it down to how DVFS interacts with how the fuel chip gets calibrated over time and another person managed to snag a copy of the fuel chip's data sheet but the instructions on the sheet on how to reset the chip in software didn't seem to work, hence the battery pull needed to reset the chip to use its stock curves.
Sent from my GT-N5110 using Tapatalk

Thank you all.

I went the new battery route with a New Power 99 one from Amazon. Nerve-wracking as Hell to put it in cuz I didn't want to screw my device up but really was easy. Now zero problems. How long this will last is, of course, the question. But even if I get another year out of it that'll bee good. I suggest you try that.

rogerperk said:
I went the new battery route with a New Power 99 one from Amazon. Nerve-wracking as Hell to put it in cuz I didn't want to screw my device up but really was easy. Now zero problems. How long this will last is, of course, the question. But even if I get another year out of it that'll bee good. I suggest you try that.
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Thanks.
But I allready change new battery from Samsung about 6 weeks ago.
It is too expensive in my country but it has 3 mount guarantee from Samsung.
Everything seems OK.

Problem solved
[/COLOR]
mrcooll said:
I have the same problem, I have already rooted my device and tried some apps to recalibrate It but useless
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Hi everybody
I have the same problem with my n5100 device, my battery % suddenly jump when charging and when discharging. So, I have returned my tablet to the post sale customer service as part of 1 year of warranty, they have changed the motherboard and now it work perfectly:good:. Actually the problem was not related to the battery

After month testing with an ebay cheapie knoxed 4.4.2 Note 8.0... All Samsungs have DVFS in the Touchwiz's build. The only way to fly is to disable it with wanam kit or DVFS disabler or Wanam xposed. Though I rather live with unplugging and plugging back in the power than to deal with Wanam's battery sucking issues with KK. Until wanam is redesigned for KK, I'm staying away.

recalibrate note 4 battery without root?

every battery recalibrator i know of needs root. my phone likes to die at 25% because i made the mistake of getting an att phone.
anyone know of a battery recalibrator that will work without root, aka on our note 4?
i've tried the whole, discharge battery fully and charge it back up, this got me to where it would die around 4% which was an improvement, but now a week later its dying at 25% again..
It's so sad such an easily fixable bug can completely cripple my phone because it doesnt have root.
anyone know of a battery calibrator, or method, aside from just cycling my phone dead/full/dead/full over and over.
thanks.

soraxd said:
every battery recalibrator i know of needs root. my phone likes to die at 25% because i made the mistake of getting an att phone.
anyone know of a battery recalibrator that will work without root, aka on our note 4?
i've tried the whole, discharge battery fully and charge it back up, this got me to where it would die around 4% which was an improvement, but now a week later its dying at 25% again..
It's so sad such an easily fixable bug can completely cripple my phone because it doesnt have root.
anyone know of a battery calibrator, or method, aside from just cycling my phone dead/full/dead/full over and over.
thanks.
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Click to collapse
Battery recalibration is just a placebo as long as you're using a stock battery. Ever since the Galaxy S2 days, battery calibration has become obsolete.
The only 2 exceptions are:
1) If you're using a cheap 3rd party battery, where they may claim that the mAh is equal to or greater than the stock battery, but in reality, it's so cheaply made that it's actually lower.
2) If you're using an extended battery that's a double or even triple layer/stack battery. In this case, the phone reads the battery incorrectly since it reads the battery stack-by-stack. In other words, when the first stack is nearly depleted, the phone will read the battery level at say 15%. Then, the second layer kicks in, and suddenly, it confuses the phone and it then thinks that it's got 40% battery left, then 60%, then 90%, etc.
The only solution to fix these two issues is to tweak the kernel (unlocked bootloader needed) or to just use a stock battery.
So in conclusion, I'd your phone isn't reading the battery level correctly, then it's most likely your battery. You'd want to get an OEM one and not some Chinese 3rd party battery.
Edit:
Some sources to back up my statement:
http://www.xda-developers.com/googl...-battery-stats-does-not-improve-battery-life/
http://www.phonearena.com/news/Here-are-10-types-of-Android-apps-you-should-absolutely-avoid_id65352
(Look at #1 on the list)
Sent from my SAMSUNG-SM-N910A using Tapatalk

Phone shutting off at 35% battery level

Ever since I upgraded to Marshmallow, the phone is shutting off at 35%.
If I plug it into a fast charger it'll start back up. Non fast charger forget it. Battery shows 35% when I plug it in to charge.
Took it to Best Buy after speaking to an AT&T tech. The Samsung rep at BB, said he ran some recovery software to check for missing or corrupted files associated with the upgrade. It appeared that they just reinstalled the 6.01 update.
Anyways it did nothing and the Samsung tech said I could try doing a factory reset or maybe try a new battery. He then said that if the problem started after the the MM update, then that's the issue. He mumbled something about the phone just wasn't able to handle MM blah blah blah.
ATT offered to ship me a new phone with a working upgrade.
Before I go that route or try a factory reset, I thought I'd check here for other ideas.
Not happy with the phone since the MM upgrade. Along with the phone shutting off issue, it's shutting off while charging on my wireless charger, phone screen is screwed up in landscape mode and doesn't show any of the buttons that show in portrait mode.
Is there a battery calibration app that will run on this without root?

I'm a computer tech, with a VZW N4. I popped over here to see if I could help a friend with the ATT N4. Looks like he's stuck without root, but saw your post and decided to reply.
I always recommend installing 'Battery Left Widget' from the Play Store and use it on the main screen. If you want to test the battery... do the following. But I'd recommend getting a new battery. It's most likely the cause of your problem.
Go to the settings and change the 'Discharging Widget Man Text' to "Estimated Battery %". The other settings can be as you wish, but I prefer the 2nd to be time remaining and 3rd to be time dead. Do the same for the charging options.
Let it calibrate for a few days. If you see a big discrepancy between the system battery (in the top right) and the widget, you've got a dying battery. Buy a new one. My Verizon version of the Note 4 started dying at 22% and rebooting. Dying battery was the cause. I knew this because it would read 72% in the top, but 42% in Battery Left Widget. And when it would get to 5% in the widget, it would start rebooting. The other battery at the top was reading much higher. A new battery fixed my woes. However the OTA upgrade to MM did a job on the battery too.
One word of advice ... turn off Fast Charging. It probably killed your battery in the first place. The original Samsung chargers will still charge it to full in a couple hours, but Fast Charging does something bad to the batteries, and they don't last as long. I know, I've had a Note 4 since day one, and I'm on my 4th battery.
A note about MM upgrade. I have to say, I wasn't a fan either. My battery didn't last as long on MM as it did on LP. The tricks about doing a full wipe didn't help. The only fix was to get my VZW model rooted and I regained control. Now I have a MM rom that actually works well and gives me 15 hours a day of usage, 3+ hours of on screen time.

What rom you are using anyway. I have changed my battery and switched to miui 8. But problem remains same with an extended battery life... But mine won't charge more than 67% and shut down @ 12% with a SOT of 3 hours and above.

rsd666 said:
What rom you are using anyway. I have changed my battery and switched to miui 8. But problem remains same with an extended battery life... But mine won't charge more than 67% and shut down @ 12% with a SOT of 3 hours and above.
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Click to collapse
I would try your battery in another device, just as a test.
Well ... mine is a VZW Note 4, not AT&T. I've used multiple roms over the past few months. I don't know what type of extended battery you are using, but if it's the ZeroLemon, it may need a better kernel to work with it. The phone doesn't know about extended batteries without additional instructions, so charging and time to empty can vary.
I just know I will NEVER buy another Samsung battery from anywhere. I think 99% of them are fake. I went with an Anker brand and it's been perfect.
Currently, I'm running MODest v5 ROM. I just installed Nseven on a 2nd device as a test. As for the MODest ROM, after only a couple of days of testing, it looks like I'll get even better battery life than I did with PaulPizz v2 (over 16 hours of heavy use compared to the 13 with PaulPizz)

Thanks for your quick reply... Im using samsung original Stock battery and there is sticker of smart care and it is from a samsung showroom
So no idea its original or not.. Should have been original... My note 4 SM 910S SK tel korian version so the rom options are very limited. Do not have any warranty period left so im confused whether i should go for a hardware checkup... Anyway im pissed of since the marshmallow arrives....the problem started right after that update.. Since then i have changed rom changed battery.. So now i guess i have to change the phone finally... Anyway thanks for your reply..

I have the same problem with charging to only 67%
If you take out the battery it will continue charging to 100%.
All this cr*p started when updated to MM
Going back to stock 5.0.1 and doing the #*0228# reset should help.
And samsung batteries are a disaster, even the genuines ones.

lg g3 battery % is lying.

I know it's a dinosaur of a device but I've got it modded and it's a good phone and works great. Ok what happens is the battery charges and holds and lasts all day but the level indicator says 100% all the time until the phone shuts down. I've flashed stock firmware from 4.4.2 to 6.0 and 3 or 4 different custom ROMs and it is the same no matter what I do. I have seen it show different battery levels in booting up after flashing something or a situation like that but its a unstable reading because of the way it'll fluctuate. So I'm thinking it's a hardware issue. The phone works as it should with the exception of that. It has a original oem lg battery unknown if it's been replaced or it's got some kind of fault. It's basically my work phone my side chic to my Nexus 6 because the SD card storage holds my music so it would be nice to have that working so I know when it's going to die. Anybody else with this issue. Thanks in advance.

Was the battery ever changed? I think it May be related to battery
G6

matuszp said:
Was the battery ever changed? I think it May be related to battery
G6
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That I'm not sure of, it's a oem lg battery and it works good and lasts all day, actually surprisingly very good battery life that's what made me think it was internals because if I reboot into recovery and then back out out when it boots it'll say battery is is dead and shut back off, but I'll reboot again OR just plug it in for a sec it'll boot back up with 100% battery life. It never gives a accurate reading. Well I'll order a new battery off e.bay there only 7$ to 10$ for a original lg battery. It's a great phone for what it is with some mods it's fast as hell.