Help GALAXY S2 Battery drained,help,urgent please

[hknakn23]

i charged my battery before i slept and when i got up battery level was in critical level ( % 13 ) there was no program working during the period ,but suddenly battery was gone.normally i did many times before , i left the battery % 100 before i slept and when i got up ,it was like % 98 ,but this time was horrible and i checked battery usage section and android os used %82 of the battery,how come its possible.i have virus? please help guys.thanks

 

[Russell Ng]

The phone is probably awake the entire time. A rogue app is probably keeping the phone from sleeping. Since its the OS that is taking the juice, its likely some stock app like something to do with wifi or syncing.

If you reboot the phone, it should clear the cache. As for finding out which rogue app, try to use BetterBatteryStats. It tells you about wakelogs and hopefully can identify which process is killing your battery. When you check the battery, I am assuming the phone is awake throughout the time.

Cheers

 

[hknakn23]

i restarted the phone it looks ok so far.thanks guys