Walk and Talk For Hours Using Shoe Power

Taking the stairs could mean more time between charges for your phone.
Researchers at University of Wisconsin at Madison have developed a shoe insert that uses the impact of your strides to generate electricity for your phone. The prototype “footwear-embedded harvester”�consists of two pouches filled with nanoparticle liquid metal called galinstan. It generates electrical current as [...]

Source: http://www.wired.com/gadgetlab/2011/08/walk-and-talk-for-hours-using-shoe-power/

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