iPod How many hours have to pass so the iPod completely shuts down?

Until you completely shut it down, or the battery dies and it is forced to shut down.

ITASOR said:

Until you completely shut it down, or the battery dies and it is forced to shut down.

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I think this depends on the generation of the nano. This was true for the two previous nano's I had (the fifth and the third), but the sixth does have a point that it completely shuts down and will reboot when you turn it on. I think it is somewhere between a day or two, I've never really timed it. Just when I haven't used it in more than a day or two it reboots when I turn it on.

My 2nd Gen iPod Touch was left on playing music with the screen turned off. It played for two days before I noticed. I was away at the time. It still had nearly half a battery left! I would say, in my case, it will play a very long time as long as you turn off the screen.