This is one of those DUH moments where I say, "damn why didn't I think of that!" The Febot is a windmill like gadget you suction cup to any surface facing the wind. A propellor collects wind energy to drive a motor that converts those kinetics into electrical energy thus promptly charging your AA battery. Hell you don't even need wind. Just place your hyperactive children next to them and make it a game. Whoever spins the most Febots the fastest gets a cookie!
via Yanko Design
you could put a few on your car!
Schweet!