Ever run out of iPod Battery without a power source in sight? This dreaded fear is found among many avid iPod users. Fortunately, Griffin Technology has come to your aid. Allow us to introduce you to TuneJuice for your iPod and iPod Mini. TuneJuice works with any dockable iPod or iPod mini. If your iPod has some charge, the TuneJuice will provide up to 8 hours of additional play; a completely drained iPod will get up to 4 hours. Pop a standard 9-Volt battery into the TuneJuice and keep rocking.