my cousin has had an iPod Mini for 2 years and she hasn't used it. yesterday, i finally installed it on her computer. we plugged it in, and it worked fine. then we plugged it in when it was off and it came up with the battery sign with the lightning bolt. we turn it back on and we get the battery with the lightning bolt. we then turn it off and the charging symbol and its not plugged in at all...its not interfeering with the playback....its just annoying to me and my cousin. what could we do about it