Massive battery drain even when phone is off. - Galaxy S 4 Q&A, Help & Troubleshooting

I recently did a factory reset on my galaxy s4, and when the screen is off it loses about 10+% an hour. It shouldn't be losing more than a tenth of that idle, at most. Using GSam battery monitor app, the vast majority of the battery is being consumed by Kernel(Android OS) and Android System. What can I do to stop this, please? Thanks for any help.

About time to buy a new battery

a602820922 said:
About time to buy a new battery
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Click to collapse
This wasn't happening before I formatted my phone, which leads me to believe it's a software problem.

Try to use one of those battery stats resetting apps
Sent from my K10 using Tapatalk

plz help

change_my_fcking_password said:
plz help
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Click to collapse
If the battery was good and suddenly began doing this, I would try to reflash stock. If you are already on stock, still reflash stock from a PC and see if it is improved. But battery drain while the phone is off usually isn't a software problem and is usually an indicator of hardware failure, typically the battery itself. You can try cleaning the pins on the phone where the battery connects. Also, try to lay the battery on a (near) perfect, flat surface and see if it is beginning to inflate even the slightest bit.

Crossvxm said:
If the battery was good and suddenly began doing this, I would try to reflash stock. If you are already on stock, still reflash stock from a PC and see if it is improved. But battery drain while the phone is off usually isn't a software problem and is usually an indicator of hardware failure, typically the battery itself. You can try cleaning the pins on the phone where the battery connects. Also, try to lay the battery on a (near) perfect, flat surface and see if it is beginning to inflate even the slightest bit.
Click to expand...
Click to collapse
The thing is it says battery usage is 80% app usage, which is mostly android system and kernel OS, while phone is off.
How do I reflash stock from a PC? Is it the same as doing a Factory data reset on the phone?
Thanks again

Related

I hate Froyo!

Thought the title would get your attention.
After upgrading to Froyo, I have many issues, two of which I'll cover here in hope that someone can resolve them.
First issue is battery life. Absolutely horrible after upgrading. Thought it would be the opposite. Can someone please provide some resolution to this issue? I've disabled a number of things said to resolve this problem but none have worked.
The second issue is the accelerometer after upgrading. Most screens end up in landscape view and switching back to portrait is difficult. I have tried to calibrate it but that didn't work. Don't like the huge delay or failed attempt to switch between both on this version. Calibration does not work.
Any help is appreciated...
pookieguy said:
Thought the title would get your attention.
After upgrading to Froyo, I have many issues, two of which I'll cover here in hope that someone can resolve them.
First issue is battery life. Absolutely horrible after upgrading. Thought it would be the opposite. Can someone please provide some resolution to this issue? I've disabled a number of things said to resolve this problem but none have worked.
The second issue is the accelerometer after upgrading. Most screens end up in landscape view and switching back to portrait is difficult. I have tried to calibrate it but that didn't work. Don't like the huge delay or failed attempt to switch between both on this version. Calibration does not work.
Any help is appreciated...
Click to expand...
Click to collapse
buy a new battery and a good charger
menu>settings> display> uncheck Auto-rotate screen
screen
Why would I want to uncheck that option? I want it to auto rotate but want it to happen quicker than it has after upgrading.
battery..
In addition, the battery is obviously not the problem here. This started after upgrading to Froyo.
Were you using a custom ROM with 2.1?
Are you using a custom ROM with 2.2?
As far as I know, the stock ROM with 2.1 didn't have great battery life either (thought I'm not sure, I rooted my phone the day I got it ). So if you're using a stock ROM with 2.2, you could have the same issue.
Also, if you are rooted, try using SetCPU. Even with the default kernel you can use it to underclock your phone when the screen's off and save a lot of battery.
pookieguy said:
Thought the title would get your attention.
After upgrading to Froyo, I have many issues, two of which I'll cover here in hope that someone can resolve them.
First issue is battery life. Absolutely horrible after upgrading. Thought it would be the opposite. Can someone please provide some resolution to this issue? I've disabled a number of things said to resolve this problem but none have worked.
The second issue is the accelerometer after upgrading. Most screens end up in landscape view and switching back to portrait is difficult. I have tried to calibrate it but that didn't work. Don't like the huge delay or failed attempt to switch between both on this version. Calibration does not work.
Any help is appreciated...
Click to expand...
Click to collapse
You hate Froyo then please return your EVO to sprint
are you running a task killer? try removing it. Have you tried any of the MANY battery life tricks? Try flashing the update.zip, could have been a messy install. you also could be suffering from useritis.
root
Thanks for the reply. No, phone has not been rooted. I simply waited for the 2.2 upgrade and can confirm both issues are a result of upgrading. You are right...the stock ROM did not have good battery life. However, after upgrading, it is much worse in comparison.
The g-sensor issue is also a huge problem. With that said, I'm looking for a fix to these two issues.
Thanks,
task killer..
tonyh703,
Yes, I'm running Advanced Task Killer which did not have a problem before. Is this an app that can cause this problem? I'll remove it if so...
You really need to do a little detective work to find out why your battery is not lasting. My battery is actually lasting noticeably longer on froyo. I was using Fresh 1.0.1 before with Netarchy's kernel and would just barely make it through the day of moderate use. Now that I have updated to Fresh 3.1.0.1, I am easily making it through the day with about the same use. Yesterday, I went 14 hours and still had 26% left when I plugged it in for the night. My usage was about 2 hours streaming last.fm, about a half hour of phone calls, about 1 1/2 hours of internet and twitter, about 45 minutes watching video's, and an hour and a half of reading with my kindle ap. To me that is pretty darn good. I have gps on, twitter syncing every half hour, and google sync on, most of my other stuff like email and such is set to manually sync. The only thing I did notice is that the first day after going to Froyo, my battery went down pretty quick, but after a day or two it settled down to the way it is now on it's own. Today I have had about the same use as yesterday so far, and have been off of the charger for 11 hours and have 76% remaining.
As to your other problem, can't say, mine is working fine.
If youve got an led flashlight type of app installed uninstall it they conflict with the HTC LED flashlight. That seems to be the most common problem with people upgrading to Froyo.
Agree on your second point. I wish there was a way to at least lock the screen to an orientation when need. The delay though is ridiculous.
I have also noticed that the delay to type sometimes is severely long causing me to retype the words a second time before they appear in the screen.
Sent from my PC36100 using XDA App
FWIW - I found a little trick on a forum somewhere that allegedly came from HTC techs...
It goes like this - first, charge your phone as normal (phone on, 8 hours)
Then, after 8 hours and the phone reporting fully charged status, take the phone off the charger for about 3 minutes (just enough to slightly discharge it) and then turn it off (power down) and put it back on the charger for an hour or so.
Then, take it off the charger and turn it back on.
That's it! It sounds a bit ridiculous, but I think the cited reason was that whenever you install a new ROM, the "system" needs to understand when the battery is truly full and this trick helps to recalibrate and ensure that it is.
I really don't have any way (nor the desire) to verify the science behind this, but I did it myself after the horrible battery life I got with FroYo.
About a week out now and my battery is behaving completely normally, and possibly better than with 2.1, though only marginally if that...
Give it a shot - if it works, there you go, if not... Well it's not like you've lost anything.
Good luck, though YMMV.
Sent from my EVO 4G (Froyo - Stock HTC Rom)
have any of yall had a long delay when putting in a name for the reciver in sms? I kid you not it takes almost 3 to 5 sec for it to pull up a name and phone number from my phone book.
Its sad that you need to do "tricks" to get decent battery life, because most people expect it out of the box. Yes you can apply a custom rom with a undervolted cpu, but that shouldnt be necessary. I personally love doing all that stuff, but the majority of people are completely ignorant to these methods and might return their phones because of battery life, but for you people on here...BAKEDSNACK 1.2.5 with the latest of his kernel..amazing battery life.
Get rid of that task killer!! Froyo does not need it... Not to mention none of the task killers support Froyo correctly. Uninstall it, try using Froyo without it.
I recommend getting rid of the task killer and go without system panel lite. It works with froyo without any problems. I also recommend letting your battery completely die out before charging it again.
My Evo worked without any issues after the update to froyo. Also, if you are a widget fanatic, I recommend limiting the amount yo u use . The reason being that everytime you unlock your phone and scroll from one page to through next, you are loading said widgets into memory which help to eating up the battery quicker.
Also if you have a lot of things updating in the background, that can kill your battery quicker. I'm always on my phone and get anywhere from ten to fourteen hours of use. I also use a cpu manager to extend the life of my battery when not in use.
Sent from my HTC Evo
DO NOT DEPLETE YOUR BATTERY COMPLETELY!! These are Li-ion batteries. Depleting the battery too much can damage the cells. Discharging the batteries 100% before charging to avoid memory effect is a phenomena unique to Ni-Cad batteries. If a Li-ion is discharged too severely, it causes an irreversible reaction inside the cell that prevents the battery from holding any charge at all. This common in laptop batteries.
To the OPs issue, do you have the latest Facebook update (1.3.1)? Version 1.3.0 had an issue that was keeping the phone awake eating up battery life.
Sent from my PC36100 using XDA App
sombdy said:
DO NOT DEPLETE YOUR BATTERY COMPLETELY!! These are Li-ion batteries. Depleting the battery too much can damage the cells. Discharging the batteries 100% before charging to avoid memory effect is a phenomena unique to Ni-Cad batteries. If a Li-ion is discharged too severely, it causes an irreversible reaction inside the cell that prevents the battery from holding any charge at all. This common in laptop batteries.
To the OPs issue, do you have the latest Facebook update (1.3.1)? Version 1.3.0 had an issue that was keeping the phone awake eating up battery life.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
I could see how this could be bad if you discharged it completely every single time, but every phone ive had including the iphone, it has been specificly stated many times to COMPLETELY DISCHARGE THE BATTERY ATLEAST ONCE A MONTH
Still no luck...
Guys,
I have removed the task killer and have removed the other LED Light utility. Still having battery issues. Any other suggestions please??
Also,
What about the accelerometer? Having many issues with it. First off, when a text msg comes in, it automatically shows in landscape. Phone switches to landscape fine but it is very difficult to switch back to portrait.
Any other help is greatly appreciated.
Thanks,

Updated from 2.2 to 2.2.1 now have Battery Issues :(

Hi all,
Basically a few days ago I updated the firmware via Kies from 2.2 to 2.2.1 on my Galaxy S. However, I instantly noticed a huge decrease in battery life - 50% gone overnight when in standby! So I factory reset the phone and had everything disabled - the phone only lost 10% in 24 hours. So I decided to try and eliminate the possible causes so first I turned on wifi and within 2 hours I have lost almost 30% of the battery life with no usage so wifi seems to be the culprit
In the wifi menu network notification is off, however, the device seems to be scanning for networks every 5-10 seconds even when connected! I had no problems like this on 2.2 where I could comfortably get 2 days usage with wifi on. Also as I would prefer wifi to be on constantly when connected I would prefer not to change the wifi sleep policy. Any suggestions would be much appreciated
Many thanks, and sorry if there's similar thread already
which version of 2.2 did you have before?
try a flash back and see what happens.
Or try to drain battery (do not charge till 1% or almost dead) then full charge it.
Always happen to me when I flash my phone to a new ROM.
Thanks for the replies. I've tried leaving the battery till it was almost drained but maybe I'll let it go completely flat and charge it see if that makes a difference?
Also trying juice defender from the market to see if that helps. Not sure if it is a problem with the firmware though been looking around and a few people seem to have had the problem with no real solution
Might have to go back to 2.2 but would prefer not to as I've noticed a big decrease in lag on 2.2.1. Also can't remember what version of 2.2 I had I'll see how the battery life goes over the next few days after trying a couple of drain/charging cycles hopefully won't have to downgrade it. Come on 2.3.2
Thanks for the replies so far
Battery Bug is Major issue with all the versions of 2.2.1, Battery life is very bad. Even the Browser is worst in 2.2.1. May be in 2.3 it will get fixed.
I have tested all the new releases of 2.2.1. I found its smooth and fast.
A1exM said:
... replies. I've tried leaving the battery till it was almost drained but maybe I'll let it go completely flat and charge it see if that makes a difference?
...
Click to expand...
Click to collapse
Very very bad idea to let the battery go completly flat, it's the best way to damage it and even lose 20% of his initial capacity. Never go under 10%.
To calibrate it properly, wait 10% turn off the phone, fully charge it, restart. (do it again 3 times).
ttf said:
Very very bad idea to let the battery go completly flat, it's the best way to damage it and even lose 20% of his initial capacity. Never go under 10%.
To calibrate it properly, wait 10% turn off the phone, fully charge it, restart. (do it again 3 times).
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Click to collapse
The battery is calibrated to do this already, the charging circuit will not allow power to the device unless there is a certain amount of charge in the battery. It's there to protect the battery from this exact eventuality.
bullzeye.za said:
The battery is calibrated to do this already, the charging circuit will not allow power to the device unless there is a certain amount of charge in the battery. It's there to protect the battery from this exact eventuality.
Click to expand...
Click to collapse
That's how it's supposed to be in an ideal world.

Exhausted every effort trying to fix this problem.. ATRIX 4G: new battery time?

I'll post everything I've tried and everything that's gone wrong here.
So initially I purchased this phone off of a friend nearly brand new, the screen had broken and had been replaced. Otherwise the phone is in perfect factory condition.
I unlocked the phone, and am using it on Rogers. APN settings working perfectly.
I installed GOLauncherEX on the phone as Motoblur wasn't doing it for me.
Battery life was crap (lasting hardly 3 hours and dying while I sleep). I found that Motoblur HOME had been running alongside GOLauncherEX. At first I simply uninstalled the third-party launcher, but then opted to grab LauncherPro+ and HomeSwitcher. This dramatically improved battery life.
Lately, I've been having issues once in awhile again. Mostly if I leave the phone unplugged while I'm sleeping (fully charged when unplugged) and we'll use the timeline 3am - 11am. It would either die completely or drop to around 15%.
As long as I could have enough charge to last me through work, I was fine with this as it was way better than what had been happening before.
This morning something extreme and unexplainable happened.. and it's the first time I took a look at the battery usage meter to see what had happened. Picture is below.
If someone could offer some tips or help that would benefit me even the slightest, it would be very much appreciated.
My bad for sneaking a link in, but it was the only way to show the issue.
a8.sphotos.ak.fbcdn.net/hphotos-ak-ash4/s720x720/390662_10150380313609839_506884838_8126371_1297964124_n.jpg
(Remove the space between 1297964 and 124 at the end)
Oh and also, phone is rooted, bloatware is frozen via Titanium Backup Pro.
Have you recalibrated?
WiredPirate said:
Have you recalibrated?
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Click to collapse
Do you have any suggestions as to what to use to calibrate?
I'm not keen on flashing any new roms if that makes a difference.
SL1VR said:
Do you have any suggestions as to what to use to calibrate?
I'm not keen on flashing any new roms if that makes a difference.
Click to expand...
Click to collapse
Calibrating is something you may need to do after flashing a ROM, you can search and find a guide or you can use this app.
I have not flashed any new roms and I don't intend on doing so, but I'll check out the app you posted.
Thanks for your help,
any new ideas are still welcome.
The benefits of battery calibration are not limited to only if you flash a new ROM. Battery calibration should be the first thing you try if you are experiencing battery troubles imo, and there is allot more in depth information in the guides you could search for.
There is one more thing I can think of you can try, download Watchdog and see if there are any malicious or poorly written apps burning up your cpu/battery.
WiredPirate said:
The benefits of battery calibration are not limited to only if you flash a new ROM. Battery calibration should be the first thing you try if you are experiencing battery troubles imo, and there is allot more in depth information in the guides you could search for.
There is one more thing I can think of you can try, download Watchdog and see if there are any malicious or poorly written apps burning up your cpu/battery.
Click to expand...
Click to collapse
Thanks for your help, grabbing Watchdog now.
Maybe unlock the bootloader and flash a custom rom?
Go into account and sync and shut off background data. I was getting. 10-12 hours battery life and now over 30 by just doing that. Worked for a buddy at work too.
Sent from my MB860 using XDA App
Radio is key. After I flashed radio 1.77.30p, my phone can easily using 3 days without freeze anything.
Do not use 1.97 radio and don't use task killers. 2.3.4 gingerbread does a much better job of killing tasks than Froyo did and it's unnecessary. Also, turning off background data is not necessary.
Phalanx7621 said:
Do not use 1.97 radio and don't use task killers. 2.3.4 gingerbread does a much better job of killing tasks than Froyo did and it's unnecessary. Also, turning off background data is not necessary.
Click to expand...
Click to collapse
I would say it is. Apps including google will try and update and locate your phone via 3g and gps when its sitting there idle. Its not necessary if you only install apps that dont use background data, or disable them individually but some dont allow it.
I still was able to get 15 hours with data enabled and over 30 with it disabled. There is a huge difference there. I just have to open my yahoo now to update it which I dont mind.
While I appreciate everyone's replies and help, has anyone actually looked at the picture I posted?
As much as I am most definitely interested in prolonging my battery life, that picture is showing a sudden drop from 70% to completely dead, idling, screen off, while I'm asleep.
SL1VR said:
While I appreciate everyone's replies and help, has anyone actually looked at the picture I posted?
As much as I am most definitely interested in prolonging my battery life, that picture is showing a sudden drop from 70% to completely dead, idling, screen off, while I'm asleep.
Click to expand...
Click to collapse
I would purchase a new battery from Motorola, It looks like your battery has one or more bad cells in it. Only thing that really explains it. Even with everything turned ON as far as data - the battery should not drop that far that fast.
i'm not entirely sure whats going on with the charge level dropping so sharply. Either something is draining your battery big time or the readout when it says 100% is incorrect.
I had issues with the battery up time as well. In my case, the battery wouldnt last more than 8-9 hours. I had to charge it two times a day. Once overnight so its 100% when i go to work and again as soon as i get home. If i charged to 100%, unplugged and went to bed, it would be at 15-20% when i woke up.
The last time i went abroad, i left the radio turned off completely. I noticed that the battery held its charge for about a day and a half.
Now i did root, unlock the BL and install CM7 on my phone. It seemed better but not that much. After i setup the phone to NOT use my 3G data connection while my wifi was on, i noticed that i was getting great battery life when i was at home but still rubbish at work.
I'm doing a test right now to see if this makes a difference or not. I have turned off data on my phone all together this morning. I charged it to 100%. Normally after 6 hours at work, my phone is at about 30-35%
Right now its sitting at 75%
the 3g is whats killing the battery, on my phone anyway. I will see how long the battery lasts without turning on my data at all. Then i will compare that with how its like with background data turned off.
I would suggest you try re-calibrating your phone's battery, i use battery calibration from the market. Then either turn data off altogether like i have or just turn background data off as the others have suggested and see what kind of a difference it makes.
While i realize you dont want to, it may help further to have a ROM like CM7 installed as it wont have all the bloatware that can further reduce the performance of your phone. You should definitely give turning the data off a go to see its the culprit before you go spend money on a new battery which may or may not fix the problem.
Best to isolate the root cause before you spend money on fixing it. If turning off the data doesnt do it, then you very well may have a battery problem.
Routaran said:
i'm not entirely sure whats going on with the charge level dropping so sharply. Either something is draining your battery big time or the readout when it says 100% is incorrect.
I had issues with the battery up time as well. In my case, the battery wouldnt last more than 8-9 hours. I had to charge it two times a day. Once overnight so its 100% when i go to work and again as soon as i get home. If i charged to 100%, unplugged and went to bed, it would be at 15-20% when i woke up.
The last time i went abroad, i left the radio turned off completely. I noticed that the battery held its charge for about a day and a half.
Now i did root, unlock the BL and install CM7 on my phone. It seemed better but not that much. After i setup the phone to NOT use my 3G data connection while my wifi was on, i noticed that i was getting great battery life when i was at home but still rubbish at work.
I'm doing a test right now to see if this makes a difference or not. I have turned off data on my phone all together this morning. I charged it to 100%. Normally after 6 hours at work, my phone is at about 30-35%
Right now its sitting at 75%
the 3g is whats killing the battery, on my phone anyway. I will see how long the battery lasts without turning on my data at all. Then i will compare that with how its like with background data turned off.
I would suggest you try re-calibrating your phone's battery, i use battery calibration from the market. Then either turn data off altogether like i have or just turn background data off as the others have suggested and see what kind of a difference it makes.
While i realize you dont want to, it may help further to have a ROM like CM7 installed as it wont have all the bloatware that can further reduce the performance of your phone. You should definitely give turning the data off a go to see its the culprit before you go spend money on a new battery which may or may not fix the problem.
Best to isolate the root cause before you spend money on fixing it. If turning off the data doesnt do it, then you very well may have a battery problem.
Click to expand...
Click to collapse
I'll definitely try everything you've mentioned, I did calibrate my battery since I first started this topic. I'm not sure if there's a difference, if there is, it isn't noticeable. My phone died last night, and I charged it overnight again so I haven't had a chance to see if what happened the other night will happen again. Soon enough, I'll post details if I notice anything peculiar.
Since you said you bought the phone off a friend I would like to make sure you have the right battery.
The battery "must" be of the following to show the right charge level, otherwise it might appear the battery discharging very quickly.
The part/model no.: SNN5893A
Manufacturing Date: ??/April/2011 or onwards
In regards to the poster above who mentioned shutting off background data, my phone lasts 17-19 hours running CM7 with nothing frozen, background data on, and I record quite a bit of video + pictures every day. I don't use task killers either. So I'm thinking that maybe the background data thing is either actually covering up a radio problem, a carrier issue, previous ROM information leaking through, or a faulty battery as stated above that could possibly need replaced.

[Q] LG G2 D802 battery problem after getting overheated

Hi all,
I would like to ask you(with better skills than me) something about my LG device. Once I got up after listening to music my device was approximately 42celsius degrees and i had to turn it off for 30 mins to get it on a normal temperature. After that I realized my device battery is draining so fast. I don't know why....my idea is that: because of the high temperature or it's a software bug. I plug my phone off at 6:30am and after using it a little I only have maximum 20% at 4:00pm. I'm using Alegen's 5.0.1 rom and all the people who use it said they haven't got a problem like me. I downloaded CPUz and it says my battery life is good. So please help me because I don't know what to do.
Sorry about my English.
42 is a verry low temp. My G2 have 45 in idle, doing nothing. Dont worry, there is no pb with battery
x3m.zone said:
42 is a verry low temp. My G2 have 45 in idle, doing nothing. Dont worry, there is no pb with battery
Click to expand...
Click to collapse
Thanks for your answer but what should I do with my battery draining? I'm using it on a very low brightness and wifi is turned off,etc...
Make a nandroid backup and then try reflashing to stock after a full battery charge. Use the phone until 5-2% and then fully charge it. Then use as normal and see if it helps. If that hasnt helped it could be battery issues.
Also when the phone heats up is it near the top beside the camera?
Sent from my LG-D802 using Tapatalk
heavy_metal_man said:
Make a nandroid backup and then try reflashing to stock after a full battery charge. Use the phone until 5-2% and then fully charge it. Then use as normal and see if it helps. If that hasnt helped it could be battery issues.
Also when the phone heats up is it near the top beside the camera?
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
Yes I would say but I don't know for sure
magonydavid said:
Yes I would say but I don't know for sure
Click to expand...
Click to collapse
Mine heats on same place, so i think its CPU/GPU there, as battery is lower than that, so its normal
nikola016 said:
Mine heats on same place, so i think its CPU/GPU there, as battery is lower than that, so its normal
Click to expand...
Click to collapse
Ohh but I don't know why my phones battery keep draining....
magonydavid said:
Ohh but I don't know why my phones battery keep draining....
Click to expand...
Click to collapse
Maybe you have some apps which keeps your device awake, try with another rom/kernel kombination (dont use 5.0 roms to test battery as battery is better on stock based roms)
nikola016 said:
Maybe you have some apps which keeps your device awake, try with another rom/kernel kombination (dont use 5.0 roms to test battery as battery is better on stock based roms)
Click to expand...
Click to collapse
99% of the time this is the case - a rogue app running, or one of its services, keeping the phone awake and running in the background.
OP, try this: reset the phone to factory settings, restart it and then just leave it like that for 30 minutes or so. Don't even enter your SIM PIN or anything. If the phone is still heating up, the unit is defective and requires service (it is not impossible that the battery is shorting out somewhere somehow).
robogo1982 said:
99% of the time this is the case - a rogue app running, or one of its services, keeping the phone awake and running in the background.
OP, try this: reset the phone to factory settings, restart it and then just leave it like that for 30 minutes or so. Don't even enter your SIM PIN or anything. If the phone is still heating up, the unit is defective and requires service (it is not impossible that the battery is shorting out somewhere somehow).
Click to expand...
Click to collapse
Under factory reset you mean I have to backup the original LG software or my lollipop rom is good?
No, just try resetting to factory defaults (obviously, back up everything important), you can do it either through the menu or the recovery.

Sudden battery drop, 70%-->0%, on newly replaced battery

I have replaced my battery with what should be an original battery for the Huawei P8 GRA-L09, battery nr: HB3447A9EBW.
After having assembled the phone again I experience some weird issues with the battery level dropping from 50%, 60%, 70% or even 100% in an instant. I have tried calibrating the battery by letting it die completely, recharge to 100%, let it drain completely again and recharge to 100%. I have tried different battery calibration apps and a factory reset - nothing helps.
I contacted the company I bought the battery from and got a replacement - still same issue.
Unfortunately i damaged the original battery when taking it out, so i cant use that as a reference.
All stats seems to be similar on the new batteries as on the old one, but for some reason the width of the new battery is a few millimeters smaller than the old one, meaning that it does not fill out the space completely. Has anyone else experienced the same?
Any suggestions on what my problem might be will be most appreciated!
KrisDnul said:
I have replaced my battery with what should be an original battery for the Huawei P8 GRA-L09, battery nr: HB3447A9EBW.
After having assembled the phone again I experience some weird issues with the battery level dropping from 50%, 60%, 70% or even 100% in an instant. I have tried calibrating the battery by letting it die completely, recharge to 100%, let it drain completely again and recharge to 100%. I have tried different battery calibration apps and a factory reset - nothing helps.
I contacted the company I bought the battery from and got a replacement - still same issue.
Unfortunately i damaged the original battery when taking it out, so i cant use that as a reference.
All stats seems to be similar on the new batteries as on the old one, but for some reason the width of the new battery is a few millimeters smaller than the old one, meaning that it does not fill out the space completely. Has anyone else experienced the same?
Any suggestions on what my problem might be will be most appreciated!
Click to expand...
Click to collapse
Yeah, my replacement battery was also smaller than the original one. Also, I was getting sudden drops from 9 percent to 0 in a minute. After disabling Huawei Perfhub (Root access required), the drops were gone.
erayrafet said:
Yeah, my replacement battery was also smaller than the original one. Also, I was getting sudden drops from 9 percent to 0 in a minute. After disabling Huawei Perfhub (Root access required), the drops were gone.
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Thank you for your reply.
Do you have any idea what is happening, why disabling the Perfhub works/are necessary?
Want I loose other functionalities when disabling the Perfhub?
KrisDnul said:
Thank you for your reply.
Do you have any idea what is happening, why disabling the Perfhub works/are necessary?
Want I loose other functionalities when disabling the Perfhub?
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I guess, they are trying to do some kind of trottling by showing unreal percentages. Something like what Apple did with the iPhone 6.
erayrafet said:
I guess, they are trying to do some kind of trottling by showing unreal percentages. Something like what Apple did with the iPhone 6.
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Yeah that might be, but if that is the case that trottling has gone terribly wrong on my phone.
Can you give me a hint on how you disabled the Performance Hub?
KrisDnul said:
Yeah that might be, but if that is the case that trottling has gone terribly wrong on my phone.
Can you give me a hint on how you disabled the Performance Hub?
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Rename /system/bin/perfhub file to something else and test. If it works (Doesn't work always), you will see a slightly different battery stats page.
How can I locate the perfhub file, It looks like there is no such directory in my mobile's memory?

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