I just charged the phone all night after letting it discharge completely and I just realized after 20 minutes use with nothing but wifi on and battery saving mode on that I just lost 20% of my battery already after just unplugging it. Its never lost power this fast before is it the update that did this? Please help me. I would add a photo but I don't know how to resize images on a phone. It says I have 1 hour and 30 minutes until it dies. I JUST UNPLUGGED IT THOUGH! Ahhh