A Taiwanese professor by the name of Chungpin Hovering Liao has created what he believes is the world's first chlorophyll organic battery. Precisely how the battery works is a mystery, but the inventor claims that it can use any liquid (even urine) to generate a charge within 10 seconds. He also claims that the storage capacity is double that of Japan's water-powered fuel cells, but it only puts out half the power of a traditional battery. Still, it would only cost 3 to 6 cents to produce a single, completely biodegradable unit. Liao has patents pending on his chlorophyll batteries
But to think your pee can power alot of things, that really makes me feel empowered.