when i use my nano, after about 15 minutes the volume shuts off?

Hi mwill42168,

Thanks for visiting Apple Support Communities.

If the sound on your iPod nano isn't working reliably, the first 5 steps in this article can help:

iPod nano (5th generation): Sound through speaker with headphones connected

http://support.apple.com/kb/TS3186

If you have a different generation iPod nano, this article will help with resetting it:

How to reset iPod

http://support.apple.com/kb/HT1320

If these steps don't solve it, try restoring the iPod:

Restoring iPod to factory settings

http://support.apple.com/kb/HT1339

Best Regards,

Jeremy