Tag Archive for 'Wi-Fi'

The battery-free phone can sense speech, actuate the earphones, and switch between uplink and downlink communications, all in real time. It is powered by either ambient radio signals or light. Image credit: Mark Stone, University of Washington.

First Battery-Free Cellphone Harvests Power from Ambient Radio Signals, Light

Jul 14, 2017 by News Staff

A team of computer scientists and electrical engineers at the University of Washington has invented a cellphone that requires no batteries and harvests...