Power MP3 Players and electronics with sweet potatoes

This video is exactly what you need if you run out of batteries in your MP3 Player, Sirius Satellite Player or any other small electronic device. You probably remember from science class that potatoes have power, but did you realize you can power your modern day electronics?
Go get what you need: 2 Sweet Potatoes, 2 Galvanized Nails, Copper Wire, Electrical Leads, Battery-less Electronics