Rather then carrying extra juice packs and chargers this innovative concept by Song Teaho & Hyejin Lee allows you to charge your devices battery with a few quick spins on your finger.
Well approx. 130 revolutions to be exact to help you make that import call and keep you going until a full charge.
Might be a little tricky on the current version of the iPhone at the moment. But anything to help keep your devices juiced up has to be a good thing. Especially when you dont have to carry any other gadget to do it.