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Cellphones

+ - Scientists Make Shake-to-Charge Cellphones a Real Possibility->

Diggester writes: It was a team of researchers at Virginia Tech, led by Shashank Priya, that created an emergency charging device that is powered by the movement of your phone. It uses what is called piezoelectric force to create this energy, and this force can be caused by typing on the phone's keyboard, speaking into the phone, and (more efficiently) shaking it like a polaroid picture.
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Scientists Make Shake-to-Charge Cellphones a Real Possibility

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