I would like to know more about charing my iPod. When i charge, can i use it at the same time? I heard that it will not get overcharged, but how long is the limit? And let's say i charged it with a wall charger til its full, unplugged and maybe used a bit of battery. Then i want to sync movies or whatever into it, how? By connecting it to iTunes i will also charge it, will it harm the battery? Thanks a lot 