Nothing worked for me trying to restore and ipod 4th generation which had a perfectly working strong battery after not being used for years. the device will enter DFU mode, show the cable on the device, Itunes will recognize the device, but it will exit DFU mode instantaneously, and once restore is selected, it will read a message that the device has left DFU mode, and you need to disconnect and put it back into DFU mode. Then its just a loop, same thing. Tried everything, guess its fried. Bummer because I love the Ipod and they don't make them anymore.