As of Wednesday my phone has has weird battery behaviors. First it would only charge if I had the phone in a certain position. On top of that as of Wednesday night I turned it off to charge while turned off. Before I slept it was 100%. When I woke up it was at 75 %. Thursday I held it in the needed charging position until it was fully charged. I then unplugged it and turned it off. When I woke up and turned it on it was at 72% despite it being turned off at 100. The battery still lasts as long as it did before with normal use but for some reason it loses battery life when turned off and not charging. It also only happens overnight. It never loses power when turned off in the day. My phone is a Samsung Galaxy exhibit 4G from metro pcs and I've had it since July 2014 without issue until Wednesday. Any knowledge on why this happens and how to solve?