I've had the phone since the 16th and the battery has been terrible the whole time. This is my first Android and I didn't realize it was a good thing to do full power cycles the first few charges. For esentially the whole week, I would keep it plugged in at work for periods of time when it was getting low (around 20%) and would get it to around 50% or so. I would then charge it over night when I went to bed. I'm using the extended battery. I'm doing my first full power cycle right now. Is it too late for this? Have I already ruined the battery or will it hopefully get better over a few cycles?