Battery life sucks ass. If you play Clash of Clans, say goodbye to your battery life. I have to manually kill it after I'm done each time, because, otherwise, it'll run in the background. There needs to be a way, perhaps an advanced tab, where you can give zero cpu to a background app. Seriously, I don't need background apps to run, other than to pick up notifications (ie, when a notification comes in, wake up, pick up the message, and then zero cpu again).