How to Turn Off an iPod Nano 3rd Generation
Turn off your third generation iPod Nano when you are not using it to preserve the battery. Not only will this extend the current charge of the battery; it will maximize the life of the battery. You can easily access the on/off commands of the device by using your touch-wheel.
Unlock your iPod if it is locked by sliding the "Hold" switch to its off position.
Locate the "Play/Pause" button at the bottom of your touch-wheel.
Press and hold the "Play/Pause" button until the iPod shuts off.