So i left my phone on last night when I went to bed and when I woke up it wouldn't turn on. Plugged it in and saw that my battery had died. But I had almost a full battery when I went to sleep. I didn't leave music playing or anything like that and I'm having a hard time believing that just keeping my wifi on would drain the battery that much. I do all the time and this is the first time it's happened. Any ideas?