Via Gizmondo...

"Japanese researchers have cooked up a minuscule kinetic battery capable of generating more energy than anything of its kind. Through only the slightest vibrations, the tiny device cranks out 22 milliwatts—20 times more than anything similar before it."

Even better is all the suggestions people have for it in the comments...

Too cool -- a documentary about the Maker and Hackerspace movement. They don't buy stuff, they make it!

Looks like it could be built from robot parts, no?

See the rest @ Cool Material

Slideshow at New York Times

More at PopSci