I don't know if the 4.3 update has to do with this but my phone was almost dead last night and I was too lazy to get up, so in the morning I turned it off and put the charger in. When I was done showering I came back and the phone went from about 4 percent to 47 percent. I turned it back on and it charged normally, to about 50% till I unplugged it and went to school. All was fine until it was almost dead without any use by the end of the school day. So further investigating I tried it again. My phone was almost dead after school so I turned it off and plugged the charger in. The battery (when the phone is off) shows a symbol of about 25%. When I turned it on it had 27% and it was dying quickly once again. What do you think I should do to diagnose this problem?