I've got a 160gb iPod classic. It doesn't seem to want to charge but the battery still keeps a charge. Like right now the battery is about 30% but it would still last a few hours but I've had it on the charger overnight and doesn't fully charge at all. I don't want to buy a new battery if that's not the problem. I've taken it apart and disconnected the battery connector, reformatted the firmeware but I still get the samething.