Sonnet BATG-EXT Lithium-Ion (Li-Ion) 2100mAh 5V rechargeable battery

Volta (iPod Rechargeable Battery) Video Viewing Nirvana.
Enjoy the luxury of extended video playtime.
Combined with a charged iPod with video, Volta increases the total video playtime up to 16 hours or up to 80 hours of music listening pleasure!

Featuring a slim and sleek design, Volta's case is made from rugged aluminum with a glossy black finish. The iPod simply docks to Volta, which clips to the back of the iPod classic or iPod with video (a spacer pad is included for the slimmer iPod model). The combined unit stands for easy viewing and features four LEDs on the front to indicate charging status and remaining charge level.

As a complete booster battery solution, Volta includes a charging cable that can be used with any computer, AC adapter, or car charger with USB port. Additionally, it comes with a detachable belt clip for easy portability.