If the recent battery upgrades to the iPod line still weren’t enough for you, grab the Volta. It plugs into the dock of your iPod, rests on the back, and gives the player up to 16 hours of video and 80 hours of music. That’s a large increase from the 4.5 hours of battery life that the newest iPods have.

Note that if you use this device, you can’t use your iPod in an FM transmitter that attaches to the bottom dock port, or pretty much any accessory that attaches to the dock port.

Product Page [Sonnet via Shiny Shiny via uber gizmo]