Regenerative energy from your knees?
But who wants to go walking when your iPod and cell phone batteries are dead? A group of researchers from the University of Michigan, Simon Fraser University in Canada and the University of Pittsburgh have developed a knee brace with a built in generator that produces enough electricity to charge small devices. In their tests they found the brace generated 1W of electricity from less than 1W of energy expended by the people wearing the brace. Of course they will have to make the device less bulky than it's current 3.5lbs before any regular people would consider wearing one.
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