Back up Battery Pack compatible with iPod nano, mini, 3G, 4G, photo and 5G video
Ideal for outdoor activities, long trips, or periods of time away from a power cord.
Allows 15-20 hours additional playing time.
Includes a clip for secure attachment to 15/20/30 GB 4th Generation iPod.
Displays remaining battery life via LED indicator.
Requires 4AA batteries (not included).