Even im having battery problem on Galaxy S2. Kernel: 3.0.31-siyah-s2-v6.0b4+.
Usage: daily 1-2 hours of music listening, 1-2 hours of chatting on different messengers, internet surfing.... but that is very less often.
My internet data network is ON every time. I use to get very good battery on 3.6.28 more than 20 hours every time!.... but since new versions are getting released... I haven't re-installed that version and checked.
I have started this battery issue again from 3.11.* series. Now this time its even worse.
Whenever my screen is ON (while chatting on messenger, surfing on internet....etc) I can see battery percentage coming down drastically. Now I get only 6 hours of battery backup
I have already posted this via Feedback application.
Is this a common issue with SGS2? Or only im facing this issue?