I have a black 2nd gen nano that no longer works because I was charging it one day and it got really hot and wouldnt turn on anymore. I called apple and they said they couldnt replace it because it wasnt a saftey hazard. The rep suggested I leave it alone for a few days and try to charge it again. Well this was a few weeks ago and have been busy and forgot about it but today I plugged it in an after 10 minutes it got so hot it burnt my hand and I had to use an oven mit to unplug it.