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This Cell Phone Can Make Calls Even Without a Battery

In Wired Mark Harris reports image via "HELLO, HELLO. I am calling from a battery-free phone." Vamsi Talla's words in a cluttered lab at the University of Washington in Seattle are barely audible through pops and static. But the fact they can be heard at all, on a nearby Android smartphone, is revolutionary, because Talla's own cell phone has no battery at all. It draws what little power it needs from thin air.
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This Cell Phone Can Make Calls Even Without a Battery

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University of Washington researchers have made a phone that draws what little power it needs from thin air.

This battery-free cellphone sucks power out of thin air

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Researchers from the University of Washington have developed the very first battery-free phone. Its sound quality is pretty shitty, but imagine not having to charge your phone because it harvests light and radio waves from your surr...


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