Battery-Less Cellphone Prototype Harvests Energy Out of Thin Air

A team of researchers at the University of Washington has come up with a working prototype of a cellphone that doesn’t require a battery to make calls or send text messages – instead, it harvests energy from thin air, more specifically, radio signals. Right now, all it features is an LED light and buttons on a circuit board, however, a more advanced prototype with an E Ink display and better call quality is in the works. The projected was spearheaded by UW research associate Vamsi Talla, working at the lab…

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