Griffin Technology 9783TJ3 TuneJuice-2 Battery backup for iPhone or iPod

TuneJuice is perfect for extending the play time of your iPod for those times when you just gotta have more than what your iPod Battery can give you. TuneJuice works with any dockable iPod or iPod mini. When your iPod battery runs low, TuneJuice will provide up to 14 hours of additional Audio play, or 2 more hours of Video enjoyment. Pop 4 AAA Batteries into TuneJuice (your first 4 are included) and keep rocking. TuneJuice is the perfect carry-on for airplanes, and a lifesaver for road trips, ski trips, camping -- anytime you need some serious playtime and don't have a way to charge your 'Pod.
Griffin Technology recommends the use of rechargeable batteries to help reduce waste. TuneJuice uses 4 standard AAA batteries. The first four are included for free in the package. Rechargeable batteries are optional.