iPod External Battery
The Battery Tech iPod Battery is a rechargeable lithium-ion battery pack that is able to power your iPod for about 40 hours. This would be great for people going on really long trips or who are travelling to places where they might not be able to charge their iPod for quite a while. The battery is external and bypasses the regular iPod battery. It weighs about 10 ounces, so it would be easy for travellers, but not so great for things like jogging. Take this on your next camping trip.