I've waited a week or so to see if the issue resolves itself. I don't know if it's an app or what because I've never really checked to see what was using what. Before I noticed the insane battery drainage I noticed my phone getting really hot while charging (once or twice about 7 days ago). I think it might be Facebook but I'm not sure. All I know is that there is a huge difference in battery life. For 'last 7 days' Facebook says 7.1 hours in the background - again, I don't know if that's a lot, or what it normally is. Is anyone else having issues? I actually haven't tried deleting the app and re-installing it so I will try that now, but I'd like feedback if anyone is experiencing anything similar. I work 12 hour shifts and occasionally check messages and notifications (1-2 minute sessions 4-5 times a day) and I've been anywhere from 60-40% by mid-day. In past I am in the 30s% when I go to bed around 10pm. This is quite perturbing.