I've only had this phone since January, and it seemed to have good battery life (10-12 hrs). But now I'm lucky to get 2-3 hrs out of it. I did have a app killer, but I uninstalled it. I charge the battery every night. I don't think I overuse my phone (a few calls, some txt, email if I'm out and about). I don't have a lot of excess programs installed. Anyone have any ideas?