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- World's first battery-free cellphone makes calls with light and radio signals Fri, 7 Jul 17, 1:35amImagine never having to charge your smartphone ever again. We may be one step closer to that battery-free future thanks to new research from University of Washington engineers. They made a phone capable of calling people...
- Make calls with light or radio signals thanks to first battery-free cellphone Fri, 7 Jul 17, 1:35amImagine never having to charge your smartphone ever again. We may be one step closer to that battery-free future with new research from University of Washington engineers. They made a phone capable of calling people drawing...