Still Suits and Body-powered Devices
Helmholtz writes: "Soon
body powered devices may be a reality thanks to work being done at the Center for Space Power and Advanced Electronics, a NASA commercial center in Alabama. The article talks mostly about military and space applications, but I think it'd be really slick to make still suits, not to mention portable audio players, PDA, and even laptops that are powered by energy that we are generating anyway."
http://chronocentric.com/watches/winders.shtml
All the irony involved there makes me think I should just go with a battery in the first place. =)