Okay so i was listening to my ipod for a few days and then it said it was low battery but i didnt charge it i would turn it on often make sure that it still said it was low battery and then it just completely had no light to tell me if it was dead or anything but there is still a green light at the top of it that tells you if its on or off so im not sure i let it charge for a few days but it still wont turn on what does it mean please help me