My oldest son has an Mp3-and the battery wore down and I saw myself going to Best Buy-Future shop and Wal-Mart to see if they had a particular Battery for it...well it seems none of them carry such a thing. Also I was told that its best to have a charger to prevent that sort of thing from happening. It made me wonder if that wasn't a sales pitch? -anyway I was told by Best Buy that my best bet would be to order from Best Buy the battery as they don't stock any of those batteries in their stores. Does anyone know of a reliable website to purchase(along with best Buy) these batteries? Has anyone else ever had this problem before?