I got my ipod touch (second generation) off ebay and since it got to me, the battery life sucks. It lasts about an hour or so before needing to be charged. The previous seller had no problem with this, and said that when he had it it lasted for a whole day. So what am i doing wrong? I can play a few games a maybe a video before it needs to be charged. I dont understand, could anyone give advice to how to fix this?