Back to the Future fans will remember the quote "1.21 gigawatts? 1.21 gigawatts? Great Scott!" I couldn't help but think of this famous line when I read about a new battery technology that generates 100 milliwatts of electricity.
Toshiba announced a fuel-cell breakthrough with a thumb-sized prototype designed to power MP3 players and cell phones. Apparently, it can power an MP3 audio player for about 20 hours on a single 2 cubic-centimeter charge of methanol fuel.
While it's not plutonium, 20 hours of playback is nothing to sneeze at!