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.