Ever run out of iPod battery without a power source in sight? TuneJuice 2 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. Pop a standard 9-Volt battery into the TuneJuice and keep rocking. It's the perfect carry-on for airplanes, road trips and ski trips. Anytime you need some serious play time and don't have access to charge your iPod, TuneJuice is a lifesaver.