Battery issues (hardware I think) GALAXY SII GB. - Galaxy S II Q&A, Help & Troubleshooting

I've been having some minor issues with my battery draining lately and it's not to do with the stats, I think the battery itself is broken.
Basically, it can be fine, then suddenly the screen will flicker and turn off. On turning back on, I can go from 70/80% to literally 0. I can then leave it off for a minute, restart and it will return to around 50.
I've done some ROM flashes over the last couple of months but I can't see that being a problem. So I've now gone back to Gingerbread stock rooted.
Do you think I need a new battery? Because I was going to get a 2000mAh anyway.
Cheers.
Sent from Bat Country

aRc. said:
I've been having some minor issues with my battery draining lately and it's not to do with the stats, I think the battery itself is broken.
Basically, it can be fine, then suddenly the screen will flicker and turn off. On turning back on, I can go from 70/80% to literally 0. I can then leave it off for a minute, restart and it will return to around 50.
I've done some ROM flashes over the last couple of months but I can't see that being a problem. So I've now gone back to Gingerbread stock rooted.
Do you think I need a new battery? Because I was going to get a 2000mAh anyway.
Cheers.
Sent from Bat Country
Click to expand...
Click to collapse
i suggest you do a full charge.
drain your battery up to 1% or (maybe you can drain the entire battery, i am not sure if this is advisable) and charge it until 100%
doing so will calibrate your Li-ion battery

I've had it over a year, and done a ton of calibrations.
Sent from Bat Country

aRc. said:
I've had it over a year, and done a ton of calibrations.
Sent from Bat Country
Click to expand...
Click to collapse
well, go for the 2000mAh battery lol

I've gone for an Ankor 1900, see if that does the trick.
Sent from Bat Country

aRc. said:
I've gone for an Ankor 1900, see if that does the trick.
Sent from Bat Country
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Click to collapse
I'm having a similar issue did the battery fix it?

Armchairraver said:
I'm having a similar issue did the battery fix it?
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Click to collapse
Well, yes definitely.
This is 24 hours with quite heavy browsing; texts/web browsing/reddit/1hr of video. So yes, I imagine with minimal use (some calls/texts) it could last a week very easily.
Sent from Bat Country

Related

Strange battery problem help plz

My phone drains the battery very quickly from 100% to 1% but after reaching 1% it can be used for hours.Last time after the full charge battery dropped from 100-1% in about 2 1/2 hours of use on WiFi but after that it lasted for more than 13 hours on 1% but the Network data, Bluetooth and WiFi was off.
Currently i am running CM7 stable (battery fix is also applied) i was also facing such issues on the stock 2.3.4.
maybe a battery re-calibration can solve this issue?
sspa said:
maybe a battery re-calibration can solve this issue?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1198333
I have done that also followed the steps for charging given in this thread
Sent from my MB860 using XDA App
ibrahimsengul said:
I bought my Atrix 3 weeks ago. My previous device was also another Motorola, Milestone.
When I first started to use Atrix I found that the battery was draining so quickly even I didn’t install any apps yet. It was becoming 1% in 70 minutes with full display and running default apps.
I tried to full battery several times, did factory resets and finally went back to shop. The shop replaced the battery with another new one.
Still it happened same problem. Then they changed my device with another new one. It was same, too.
I would give it back to shop but last time I decided to discharge it until it turns off.
At this point I found that discharging takes long time after it became 1%. For example by heavy using it becomes 1% in 70 minutes, then it takes at least 200 minutes more even I watch videos via Youtube, play games etc.. It means in total it takes at least 4,5 hours with full display and heavy usage. That’s OK for me as battery life.
But I want my battery meter show correct percentage. Then I can be able to know when it will turn off.
I tried battery calibration several times. I search a lot about this problem but found nothing. Probably people thinks that their battery life is too short.
So cannot find solution.
Summary: My Atrix’s battery meter immediately drop to 1% and then runs 3 times longer than previous 99%. PLEASE HELP ME TO CORRECT MY BATTERY METER DISPLAY.
Do you think that your battery fix way helps me?
Please see details of my Atrix below:
MB860
2.3.4
45.0.7.MB860.Orange.en.FR
N_01.77.30P
[email protected]#2
4.5.2A-11_OLE-7 OceanR1.1
Battery calibration result in %100: 4196mV
Current charge: 40%, 3944mV
Usage: 12h 48m 1s on battery (wifi and 3g data off)
(Phone idle 72%, mobile standby 13%, display 7%)
Click to expand...
Click to collapse
Another atrix owner is also facing the same issue.
Sent from my MB860 using XDA App
maybe you can just shot that owner a PM, ask how he solved his problem.
sspa said:
maybe you can just shot that owner a PM, ask how he solved his problem.
Click to expand...
Click to collapse
He has not figured out the problem he is also looking for a solution.
I have now reflashed stock sbf 2.3.4 still having the same problem.
My device settings
Network data and Bluetooth is always off.
WiFi is only on when being used rest of the time its also off.
terminator1983 said:
I have now reflashed stock sbf 2.3.4 still having the same problem.
My device settings
Network data and Bluetooth is always off.
WiFi is only on when being used rest of the time its also off.
Click to expand...
Click to collapse
Like somebody already told you a few post back, follow these steps and it will fix your problem...
http://forum.xda-developers.com/showthread.php?t=1198333
Hint: Follow the steps!
sotodefonk said:
Like somebody already told you a few post back, follow these steps and it will fix your problem...
http://forum.xda-developers.com/showthread.php?t=1198333
Hint: Follow the steps!
Click to expand...
Click to collapse
I have already followed these steps twice but i doesn't seem to work for me.
terminator1983 said:
I have already followed these steps twice but i doesn't seem to work for me.
Click to expand...
Click to collapse
Did you flash the jug6ernaut's CWM battery fix in recovery?
Do your battery its an original battery or its a chinese one?
sotodefonk said:
Did you flash the jug6ernaut's CWM battery fix in recovery?
Do your battery its an original battery or its a chinese one?
Click to expand...
Click to collapse
Yes i have also applied the fix no battery is original it came with the phone and the phone is only two weeks used.
Have you solved this problem? I meet the same issue.
byelims said:
Have you solved this problem? I meet the same issue.
Click to expand...
Click to collapse
No nothing how u got this problem.
Sent from my MB860 using Tapatalk
terminator1983 said:
No nothing how u got this problem.
Sent from my MB860 using Tapatalk
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Click to collapse
I don't know. I bought it, and unlocked it directly, then flash CM7 Rom, but noticed that the battery drain very fast. However, after the indicator becomes 1%, I can still use rather a long time. I thought it was an error on battery meter, but I can't make it display correctly through calibration.
Now if the battery is fully charged, I can still use rather a long time after the indicator becomes 1%. But after the battery drained, it can't be charged completely. It really disappoints me very much.
byelims said:
I don't know. I bought it, and unlocked it directly, then flash CM7 Rom, but noticed that the battery drain very fast. However, after the indicator becomes 1%, I can still use rather a long time. I thought it was an error on battery meter, but I can't make it display correctly through calibration.
Click to expand...
Click to collapse
Ya that's the same problem i have i think its something to do with phone recognizing the mah capacity of the battery if u can see the charge-full-design in sys/class/power-supply/battery/charge-full-design u will notice it showing only 500 which should be 1880 that's why our phone drops and charge quickly according the capacity its getting from charge-full-design.
This value can be changed on other phone but for Motorola i have not found any tutorial or app to do so
http://forums.webosnation.com/palm-pre-pre-plus/256967-find-out-how-good-bad-your-battery.html
http://forum.xda-developers.com/showthread.php?t=765609
byelims said:
Now if the battery is fully charged, I can still use rather a long time after the indicator becomes 1%. But after the battery drained, it can't be charged completely. It really disappoints me very much.
Click to expand...
Click to collapse
And for charging don't take off the phone from charging on 100% bcoz when the phone battery meter is showing 100% its battery mv is less than 3900mv and if u keep it on charge after 100% battery mv value will gradually go up to 4200mv which is the actual capacity of the battery.
terminator1983 said:
Ya that's the same problem i have i think its something to do with phone recognizing the mah capacity of the battery if u can see the charge-full-design in sys/class/power-supply/battery/charge-full-design u will notice it showing only 500 which should be 1880 that's why our phone drops and charge quickly according the capacity its getting from charge-full-design.
This value can be changed on other phone but for Motorola i have not found any tutorial or app to do so
http://forums.webosnation.com/palm-pre-pre-plus/256967-find-out-how-good-bad-your-battery.html
http://forum.xda-developers.com/showthread.php?t=765609
And for charging don't take off the phone from charging on 100% bcoz when the phone battery meter is showing 100% its battery mv is less than 3900mv and if u keep it on charge after 100% battery mv value will gradually go up to 4200mv which is the actual capacity of the battery.
Click to expand...
Click to collapse
Oh, thanks. The value in sys/class/power-supply/battery/charge-full-design is just a result, representing the battery statue. So the key is that the battery capacity can't be recognized correctly by the phone. I just test another battery, and the value 1880!
But the former battery doesn't look like a fake one. Actually, I bought them together. I can't understand.

Battery problem

My amaze is automaticaly shuting down,and before shut down its showing 48% battery life,it is automatically restarting and showing 4% then after 1 hour its restarting one more time and showing 16% ,,, i cant understand what it is,,,and i have changes rom,from off to custum,its not helpeing ,now i am in energy stock rom,,,how can you help me,what can i do?!does it battery problem,or calibration ??!?!
gogjhan said:
My amaze is automaticaly shuting down,and before shut down its showing 48% battery life,it is automatically restarting and showing 4% then after 1 hour its restarting one more time and showing 16% ,,, i cant understand what it is,,,and i have changes rom,from off to custum,its not helpeing ,now i am in energy stock rom,,,how can you help me,what can i do?!does it battery problem,or calibration ??!?!
Click to expand...
Click to collapse
I have a similar problem. My phone randomly turns off/restarts. Afterwards, my battery icon turns gray for a few minutes. When it comes back, it drops by ~10-20%.
This actually happened to me before several months back. Last time, I called HTC and they gave me a new battery. That worked for a couple of months, but now it's back. I'm currently working with HTC tech support to get it figured out.
kered424 said:
I have a similar problem. My phone randomly turns off/restarts. Afterwards, my battery icon turns gray for a few minutes. When it comes back, it drops by ~10-20%.
This actually happened to me before several months back. Last time, I called HTC and they gave me a new battery. That worked for a couple of months, but now it's back. I'm currently working with HTC tech support to get it figured out.
Click to expand...
Click to collapse
yes the same,,,when i bought it has that problem,but after one month it fixed,,,now after 5 months it begins and i cant fixed and i ma really getting nervous of it!!!
kered424 said:
I have a similar problem. My phone randomly turns off/restarts. Afterwards, my battery icon turns gray for a few minutes. When it comes back, it drops by ~10-20%.
This actually happened to me before several months back. Last time, I called HTC and they gave me a new battery. That worked for a couple of months, but now it's back. I'm currently working with HTC tech support to get it figured out.
Click to expand...
Click to collapse
Are you stock
Sent from my HTC_Amaze_4G using xda premium
fcpelayo said:
Are you stock
Sent from my HTC_Amaze_4G using xda premium
Click to expand...
Click to collapse
I was, but I recently installed Energy rom. The problem is still there. I'm running my phone in safe mode now and seeing if my phone restarts.
Quite a few people have problems with stock batteries. I encounter the same problems regardless what ROM I'm running. I bought a couple Anker 1900 mAh batteries and will report back.
You need a new battery, but you can try draining the battery all the way down to the point that the device can't even come on, then it charge it over night all the way back up. See if that helps, it tends to help with this battery issue.
Ido I have the same prob but I was thinking how about resetting battery stats in recovery
Sent from my HTC_Amaze_4G using xda premium
I am so relived to hear that I'm not the only one with this problem. Let me tell you guys my experience with up to 3 batteries, various roms, and weeks of googling...
So basically, changing battery do fix the problem; but only temporarily. It can fix the problem for about a couple weeks or months, but the problem will come back anyway. I am on my third battery now and switching between the batteries; so, I am pretty sure that it is only a temporary fix. Cycling between the three battery sometimes is pretty helpful (but again, it is just a temporary fix).
Another way to fix it temporarily that works pretty well for me is to take out the battery, wait for about 5 seconds, and turn on the phone again. It only fix the problem for about a couple days though; so, might as well switch battery if you got another battery.
Another possibility to fix it without playing with the battery, you can try factory reset or install another custom rom. It sometimes helps also, but a pain if you are not the type that likes to try different roms.
Lastly, the better and simpler fix is to reboot to recovery, wipe all caches and dalvik, fix permissions, and reboot again. This can fix the problem (but only temporary).
Out of those four tries, I find that swapping battery or full wipe / install
Custom rom tends to fix the problem for a longer time. I haven't been able to find any permanent fox for the random shutdown yet. But, I hope those information helps for anyone who have the same problem
Sent from my HTC_Amaze_4G using XDA
Dark Nightmare said:
You need a new battery, but you can try draining the battery all the way down to the point that the device can't even come on, then it charge it over night all the way back up. See if that helps, it tends to help with this battery issue.
Click to expand...
Click to collapse
its not helping i have tried 3 times before writhin here.... (
Sent from my HTC_Amaze_4G using Tapatalk
The draining battery does work. Just turn EVERYTHING on to drain it (brightness, GPS, bluetooth etc.) and watch some videos to drain it down all the way. After this do a mini power cycle (pull battery wait awhile, put it back, then leave it charging for at least 10 hours).
This solved the problem for me
sedrader said:
The draining battery does work. Just turn EVERYTHING on to drain it (brightness, GPS, bluetooth etc.) and watch some videos to drain it down all the way. After this do a mini power cycle (pull battery wait awhile, put it back, then leave it charging for at least 10 hours).
This solved the problem for me
Click to expand...
Click to collapse
Exactly, worked for me and quite a few others, I've tested it myself when I had bought my second device used, it came with this very issue, I killed what was left of it and let it charge over night, it's been remarkable ever since, but different folks different strokes, the next best thing to do is to change the battery since that solved it for others. And for the record, the oem battery is the best to replace it with since some anker batteries have only made it worse for some.
getting my newly acquired Amaze device in a couple of days and will see if i run into this issue... god hope not lol... if battery issue does occur - will follow thru the full batt drain solution (mentioned above).
Dark Nightmare said:
Exactly, worked for me and quite a few others, I've tested it myself when I had bought my second device used, it came with this very issue, I killed what was left of it and let it charge over night, it's been remarkable ever since, but different folks different strokes, the next best thing to do is to change the battery since that solved it for others. And for the record, the oem battery is the best to replace it with since some anker batteries have only made it worse for some.
Click to expand...
Click to collapse
10 hrs tho?
Sent from my HTC_Amaze_4G using xda premium
fcpelayo said:
10 hrs tho?
Sent from my HTC_Amaze_4G using xda premium
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Click to collapse
I don't know about 10 hrs, I just put mine to charge when I went to bed, was perfectly fine and back to normal, fully charged when I woke.
gogjhan said:
its not helping i have tried 3 times before writhin here.... (
Sent from my HTC_Amaze_4G using Tapatalk
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Click to collapse
What batteries did you use?
I have this problem too, it annoys me every dam day, if I get rid of this phone any time soon it'll be just because of that :/
Sent from my HTC_Amaze_4G using XDA
fuego77 said:
I have this problem too, it annoys me every dam day, if I get rid of this phone any time soon it'll be just because of that :/
Sent from my HTC_Amaze_4G using XDA
Click to expand...
Click to collapse
Get a new stock battery should fix your problem for while
Sent from my HTC_Amaze_4G using xda premium
I'm having this issue as well. My phone would randomly just shut off on me while using it at say, 75%, then turn off. When I boot it back on, it drops to around 50% or so.
Does the battery drain fix truely work? My girlfriends phone does the same (its an acer though).
Sent from my HTC_Amaze_4G using xda premium
justin0025 said:
Does the battery drain fix truely work?
Click to expand...
Click to collapse
I have my stock battery and 2 Ankers. The phone will randomly die with any of the batteries. The battery drain trick seems to work okay, but it certainly isn't a "fix" IMO.
I drained my stock battery last weekend and charged it to 100% on the Anker charger. Worked great down to 10% on Sunday. Charged the phone to 100% on the nightstand, while I slept Sunday night. Phone randomly shutoff at ~25% at work on Monday. Had similar results with the two Anker batteries too.

[Q] Very fast battery draining!

Hello! I bought this phone last month. Since I got it, I've never experienced any problem with it. For four days, I noticed that the battery drains very quickly, without any logical explanation for this. The data connection is turned off, Wi-Fi is turned off. Last evening, I charge it to 100%. This morning,I found it turned off, with 0% battery. What solutions do you have to solve this problem? Have you encountered this problem?
DeuxEx said:
Hello! I bought this phone last month. Since I got it, I've never experienced any problem with it. For four days, I noticed that the battery drains very quickly, without any logical explanation for this. The data connection is turned off, Wi-Fi is turned off. Last evening, I charge it to 100%. This morning,I found it turned off, with 0% battery. What solutions do you have to solve this problem? Have you encountered this problem?
Click to expand...
Click to collapse
Can you please provide some more details on this?
I.E. What is it plugged into to charge? Laptop, Desktop, AC, etc etc.
- I ask this because I had a phone that would actually consume more power than a USB port could put out. when turning off the laptop, it actually allowed a back drain for some reason, and the next morning the device was dead. (Not this phone)
Also, what applications are running? Any?
Finally, you can try to retrain your battery... Wiping stats does not work, ever. So despite what anyone tells you, don't do it. You're just wasting time. SOURCE
So, how do you retrain your battery? Let it die completely. Then plug it in to charge. Don't use it while it's charging if you can help it. DO NOT remove it from the charger until it's at 100%. Once this is done, use it til it dies on it's own. Then yet again, charge it fully and then go back to your normal use.
In some cases, these batteries can go bad, for various reasons. A quick test, but is not always trustworthy is to spin your battery on either side. If it makes more than 2 full rotations, it's swelling and going out. Replace it.
The best alternative is to take it to a battery shop, and let them put it on a Cadex machine. (Pronounced Kay-Dex) ... This machine will charge and discharge the battery several times over a few hours and truly test the current life -vs- the life it should be. Anything rated less than 80% remaining life should be replaced.
SOURCE: I work here
I charge it only from power outlet, with stock charger.
Trib wrote 5 paragraphs on info you need to provide and you come back with a small sentence? Pretty much if you use your phone a good amount it will only last you a day per charge. Unless you give us an explanation on how fast it is draining it's impossible to even start helping
Sent from my LG-P769 using xda premium
psychoace said:
Trib wrote 5 paragraphs on info you need to provide and you come back with a small sentence? Pretty much if you use your phone a good amount it will only last you a day per charge. Unless you give us an explanation on how fast it is draining it's impossible to even start helping
Sent from my LG-P769 using xda premium
Click to expand...
Click to collapse
6 hours 40 minutes from 100% to 10%, and the phone in stand by! Cell standby - 45%, Phone idle - 48%, Screen - 7%
And all this after a hard reset and retrain battery! The battery is almost new (aprox 1 month)!
I want it to make a screen shot of battery drain, but I have no clue how to do that on LG L9...
Volume down + Lock key for screenshots
Sent from my LG-P765 using Tapatalk 2
rakeshmarar said:
Volume down + Lock key for screenshots
Sent from my LG-P765 using Tapatalk 2
Click to expand...
Click to collapse
I hard reset it once again. Now is on charging. After that, I will provide you a screenshot with battery stats. Thank you for your help! I try to borrow an othe battery from an other LG L9 phone to see if is the battery or the phone! I hope to find someone with that kind of phone.
DeuxEx said:
I hard reset it once again. Now is on charging. After that, I will provide you a screenshot with battery stats. Thank you for your help! I try to borrow an othe battery from an other LG L9 phone to see if is the battery or the phone! I hope to find someone with that kind of phone.
Click to expand...
Click to collapse
I attached a screenshot. Yesterday I changed the battery. Same problem! I take it this screenshot this morning, after I fully charged the phone ... Same problem, a new battery.
Can you please tell us what applications you have running in the background?
Also deactivate google now.(or the google services in google maps). download and install GSam Battery Monitor and after a cycle tell us what applications are eating your battery the most. It's clear that you either use yout phone(screen on time) allot or there is/are some applications that prevent your phone from going to sleep.
I use battery widget reborn and it shows me wneh the phone woke up,when the phone had the screen on,wi-fi on,gps on. Try it as well.
I also had battery issues when on JB. I downgraded back to ics. It's much more reliable when it comes to battery life. And the performance is about the same.
I don't have any app installed. After i replace the battery, i made a hard reset and I did not installed any app. I will install cpuspy and betterbatterystats for more results. I will back tomorrow. Until than, maybe you can provide me more advices. It can be from a damage sim card?
Sent from my S500 using xda app-developers app
I guess your signal quality isn't good enough because cell standby is eating up more than 40% of battery. Cell standby in my phone is only around 5%..
noob.gamer said:
I guess your signal quality isn't good enough because cell standby is eating up more than 40% of battery. Cell standby in my phone is only around 5%..
Click to expand...
Click to collapse
I removed the sim card, but in flight mode is the same problem... The last solution is to change the rom with a custom one. Any recomandation?
It's not that. Not the signal. It's the firmware. JB has these problems. In ICS Display is the major consumer followed by Phone Idle and Cell Standby.
I also had these problems in JB and reverted back to ICS .
I would advise you to install CM 10.1 on the phone. The battery life is better than stock. I get around 12-16 hours normally. The latest RC4 has fixed almost all the bugs present in older CM 10.1 variations. Give it a try.
I will root the phone and I will give a try with CM 10.1 or I revert to 4.0.4. If all this will be for nothing, I will sell the phone!
DeuxEx said:
I will root the phone and I will give a try with CM 10.1 or I revert to 4.0.4. If all this will be for nothing, I will sell the phone!
Click to expand...
Click to collapse
On ICS you will get great battery life Telling from my experience as i have reverted back to ICS after trying JB and CM 10.1( both have very poor battery life ) . So instead of wasting time just flash ICS and forget about battery issue :good:
Where can I find a tutorial to revert to ICS?
Same question. Can some one please give a step by step guide on how to revert to ics for l9
Sent from my LG-P765 using Tapatalk 2
Use the offline flash..
I also reverted to ICS and the battery drain keeps like a countdown
I have the p769, and I offline flashed up to V20D (and rooted). Removed some tmobile bloat, and I have pretty decent battery life. I guess I'm lucky.
Sent from my LG-P769 using Tapatalk 2

Screen flicker and device shutdown

Hi xda! So I've been having a problem for a couple of months with my SGSII and i have searched a lot but i haven't found a solution yet.
The problem is that battery behaves normally and has a normal drain rate, but when it reaches 40% more or less it drains massively and drops to 10 % (more or less, could be 11% or 9%. It is not something precise and accurate) and screen immediately starts to flicker, backlight as well, then the signal is lost and phone shuts down. After that i can not turn it on unless i charge it.
I have looked a lot and pretty much all of the forums recommended to buy a new battery. I bought another battery (original) and the problem still continued. I've also tried swapping batteries with a friend, but the problem still happened to me and not to him. Also I have tried a lot of Roms, I've tried going back to stock as well, but still nothing.
Currently I'm running Cyanogenmod 10.1 RC2 because it gives me the best battery life in those 60%.
I leave you an attachment of a screenshot. As you can see battery percent dropped a lot at the end, and i wasn't using it heavily.
Thank you in advance.
It is a hardware issue, I had the same problem (battery would drain below 10% though), sent it to Samsung, Motherboard and Charge Socket got replaced, I don't know which one was causing it because I had other issues like broken home button too.
brpper said:
Hi xda! So I've been having a problem for a couple of months with my SGSII and i have searched a lot but i haven't found a solution yet.
The problem is that battery behaves normally and has a normal drain rate, but when it reaches 40% more or less it drains massively and drops to 10 % (more or less, could be 11% or 9%. It is not something precise and accurate) and screen immediately starts to flicker, backlight as well, then the signal is lost and phone shuts down. After that i can not turn it on unless i charge it.
I have looked a lot and pretty much all of the forums recommended to buy a new battery. I bought another battery (original) and the problem still continued. I've also tried swapping batteries with a friend, but the problem still happened to me and not to him. Also I have tried a lot of Roms, I've tried going back to stock as well, but still nothing.
Currently I'm running Cyanogenmod 10.1 RC2 because it gives me the best battery life in those 60%.
I leave you an attachment of a screenshot. As you can see battery percent dropped a lot at the end, and i wasn't using it heavily.
Thank you in advance.
Click to expand...
Click to collapse
May be there would be some hardware related problem. But why dont you give a try to to a wakelock detector app like betterbattery stats or wakelock detector? Atleast you will know which app is eating your battery or is it a hardware related problem.
Nexcore said:
It is a hardware issue, I had the same problem (battery would drain below 10% though), sent it to Samsung, Motherboard and Charge Socket got replaced, I don't know which one was causing it because I had other issues like broken home button too.
Click to expand...
Click to collapse
Thank you for answering. Unfortunately I have already rooted my device hence voiding my warranty. Maybe i could have it fixed by some technician.
singhsidhartha said:
May be there would be some hardware related problem. But why dont you give a try to to a wakelock detector app like betterbattery stats or wakelock detector? Atleast you will know which app is eating your battery or is it a hardware related problem.
Click to expand...
Click to collapse
I have tried a lot of battery related apps. BBS is one if them. I haven't seen anything unsual. In fact I've also tried apps like greenify. However battery life in the first 60% of battery is actually good. After 40% comes the problem.
Send it to samsung
Install triangle away and reset counter then flash stock jb rom from your country & provider
Sent from my GT-I9100 using XDA Premium 4 mobile app

[Q] Help:Battery Drop after updated to .402?

So last night i plugged in my z2 to my laptop and download the update 402 via sony pc companion. I left it overnight and this morning when it finished updated, i switched on the phone it was at 99%.
After a few mins i look back, it dropped to 74%!
Has anyone experiencing the same issue? is this normal? is this update bad for the battery?
anyway i did a factory reset, it was still new anyway so not much things on it yet.
ps, i did not lose my X-reality.Its still there
I feel the new Rom takes a bit time to settle.Give it a day or so and then try to troubleshoot.
Sent From My Sony Xperia Z2 D6502 White
Before the update, i got ~6.2 hours SOT per charge.
Now only 4-5 hours.
I'm vastly disappoint son.
Actually one of the things I noticed early on was the biggest battery consumption compared to .55 and .69! I have just remove the device from the charger and with a bit of use, then it goes to 97%!
This is really scaring me! In FW .55 and .69 was very time to see the percentage going down!
See what its like after a weeks use and the battery is properly calibrated.
I bet you will be seeing similar results to the earlier firmware
cheetah2k said:
See what its like after a weeks use and the battery is properly calibrated.
I bet you will be seeing similar results to the earlier firmware
Click to expand...
Click to collapse
There is that right?
There is that possibility?
Why older versions did not have this time?
thanks guys for your input. Yeah i think its too early to tell on the battery consumption yet. I will observe it for a week or two and tell again
Most likely when you flash the update, the battery stats reset with other parameters, let it settle for few charges and see if it calibrates.
And check that your phone can enter Deep Sleep (CPU Spy from Play Store or similar). Could be that the update screwed that up.
SolidR53 said:
Most likely when you flash the update, the battery stats reset with other parameters, let it settle for few charges and see if it calibrates.
Click to expand...
Click to collapse
It would be good to let my battery run out completely and then charge 100% or is not recommended to do this? I know that this type of technology can not do this, but only in this case!
EDIT:
Yesterday I was using the phone and noticed that when the battery reached 60% it took longer to get down the percentage! So I was using the device and the percentage reached 29%, so I put it to charge all night. This morning I noticed a significant improvement, so much that I am using lot and is still at 97%! What leads me to believe that what user said above is true!
BR4DOKYBrazil said:
It would be good to let my battery run out completely and then charge 100% or is not recommended to do this? I know that this type of technology can not do this, but only in this case!
EDIT:
Yesterday I was using the phone and noticed that when the battery reached 60% it took longer to get down the percentage! So I was using the device and the percentage reached 29%, so I put it to charge all night. This morning I noticed a significant improvement, so much that I am using lot and is still at 97%! What leads me to believe that what user said above is true!
Click to expand...
Click to collapse
It's always like that, any phones after install new ROM(custom or official), it will take couple cycles of recharge to settle down the battery.
Well after 2 days I would say that this firmware drains battery much faster I've gone back to previous firmware version and getting much better battery results so I'll stick with this for now I think

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