|Article at http://www.takepart.com/article/2011/08/25/walking-watts-sneaker-insole-harvests-electricity-could-power-iphone|
From the article:
Researchers in Wisconsin have designed a sneaker insole that captures the electricity generated by the walker’s steps, reports Mother Nature Network.
Right now, Krupenking and Taylor are estimating between 1 and 10 watts.
The researchers say that no direct physical connection is required to bridge the insole and the wireless device.