[I9100] Samsung Galaxy S2 battery problem on CyanogenMod 12.1 - Galaxy S II Q&A, Help & Troubleshooting

Hello everybody !
I have problem with my battery in S2 on CM 12.1 ... Battery is very weak, battery becomes flat very fast When I use apps like Instagram, Facebook, Snapchat battery 100% down in 15 minutes to 82%, when i use apps which need more power battery can down to 60% very fast.
I really don't know what I can do. I try used battery calibration applications and other such as but it gives no results. I try tried stop apps in backgrounds, turn off animations. Brightness is very low too.
Please help I need working S2 to my work where is a lot call but battery does not work with me.

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Did you also try to modify the Privacy settings? There you can allow which apps are allowed to auto-launch, avoid that the phone goes in deep sleep etc. Also see the "advanced" option there. Check that Location etc. is disabled.
Sometimes there appear problems that can be solved with a new, clean flash. If nothing helps, think about buying a new battery.
BTW, I have the feeling that the percentage of battery isn't very accurate. Sometimes the battery seems to drain very fast, and later it stays the same for half an hour. Perhaps just ignore it.

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Try Greenify, it will help save battery when your device is locked.

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BenjyTec said:
Did you also try to modify the Privacy settings? There you can allow which apps are allowed to auto-launch, avoid that the phone goes in deep sleep etc. Also see the "advanced" option there. Check that Location etc. is disabled.
Sometimes there appear problems that can be solved with a new, clean flash. If nothing helps, think about buying a new battery.
BTW, I have the feeling that the percentage of battery isn't very accurate. Sometimes the battery seems to drain very fast, and later it stays the same for half an hour. Perhaps just ignore it.
Click to expand...
Click to collapse
I tried this. Battery in my S2 is not broken for sure ! I do not remember behavior battery when i haved stock ROM :/ :laugh:

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Kevin3014 said:
Try Greenify, it will help save battery when your device is locked.
Click to expand...
Click to collapse
I using this program. Yee its good app but little correct my battery :/ Hmm... I think I can install other kernel or back to older version CM but CM 11 and older is not good for me

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Had similiar problems with CM12.1. But I assumed that I've caused it myself with my app usage and hadn't the time and didn't want to search for the culprit. Now I am on CM13 and hoped that the clean flash would solve my problem. Didn't do it so I invested some time reading many things about Better Battery Stats and its usage.
You should also try to record your App behaviour when the screen is off then we could see if our problems are the same
Did a clean record with airplane mode (with BBS) last night and got nice results
===========
Other Usage
===========
Deep Sleep (): 8 h 11 m 20 s 99.5%
Awake (Screen Off) (): 1 m 40 s 0.3%
Screen On (): 35 s 0.1%
Wifi On (): 0.0%
Wifi Running (): 0.0%
No Data Connection (): 8 h 13 m 36 s 100.0%
No or Unknown Signal (): 8 h 13 m 36 s 100.0%
Screen dark (): 35 s 0.1%
Click to expand...
Click to collapse
I would say that this result shows me that it is not my battery. The nights before I did some tests with settings I normally use: wifi always on/wifi off if not in use.
Results were not nearly as good as before
===========
Other Usage
===========
Deep Sleep (): 6 h 44 m 32 s 86.3%
Awake (Screen Off) (): 1 h 3 m 14 s 13.5%
Screen On (): 47 s 0.2%
Wifi On (): 7 h 48 m 34 s 100.0%
Wifi Running (): 18 m 6 s 3.9%
No Data Connection (): 6 m 2 s 1.3%
No or Unknown Signal (): 6 m 2 s 1.3%
Good Signal (): 1 m 57 s 0.4%
Screen dark (): 47 s 0.2%
Click to expand...
Click to collapse
======================================================
Wakelocks (requires root / system app on Android 4.4+)
======================================================
GCM_CONN_ALARM (Google-Dienste): 7 m 49 s Count:112 1.7%
SnetLaunchService (Google-Dienste): 1 m 55 s Count:143 0.4%
bluedroid_timer (com.android.bluetooth.Bluetooth-Freigabe): 42 s Count:62 0.1%
...
================
Kernel Wakelocks
================
"multipdp" (): 37 m 6 s Cntc/wc/ec)326/0/326 7.9%
"secril_fd-interface" (): 34 m 24 s Cntc/wc/ec)597/0/0 7.3%
"PowerManagerService.WakeLocks" (): 13 m 55 s Cntc/wc/ec)1056/0/0 3.0%
....
======================================================
Processes (requires root / system app on Android 4.4+)
======================================================
logd (0): Uid: 0 Sys: 1 m 18 s Us: 17 m 37 s Starts: 0
system (CyanogenMod-System): Uid: 1000 Sys: 7 m 42 s Us: 11 m Starts: 0
com.microsoft.office.outlook (com.microsoft.office.outlook.Outlook): Uid: 10069 Sys: 2 m 13 s Us: 3 m 8 s Starts: 0
....
======================
Alarms (requires BATTERY_STATS permissions)
======================
com.google.android.gms (): Wakeups: 133 (17.1 / h)
com.android.phone (): Wakeups: 65 (8.3 / h)
com.android.bluetooth (): Wakeups: 36 (4.6 / h)
...
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CPU States
==========
1.2 GHz (): 1 m 57 s 0.4%
1 GHz (): 11 s 0.0%
800 MHz (): 4 m 21 s 0.9%
500 MHz (): 5 m 3 s 1.1%
200 MHz (): 52 m 28 s 11.2%
Deep Sleep (): 6 h 44 m 32 s 86.3%
Click to expand...
Click to collapse
With my current knowledge I would say that some apps often trigger the google push service (GCM_CONN_ALARM & com.android.google.gms - if I am not mistaken) and this service will wake the phone and the google service will download some data for the apps. But even if this is correct I cannot find a way to analyse which apps are the culprits. I tried with catlog but did not find anything I would understand and bind to my problem