Yesterday, I charged my phone fully and the charger was removed at afternoon, I played games in the phone for about an hour and listened to music for half an hour and browsed the net, the rest of time was stand by till night. I switched off the phone at night with 50% battery left. At today morning, I switched it on again and went to college, the phone was on stand by for 13 hours. When I returned from college at noon, the battery was low. How come? I asked my parents that did anyone use the phone or played games in it, they said it was not used at all........What drained my 50% battery? Please help me experienced Android users. My mobile is Samsung Galaxy Fit.