This battery-free cellphone runs on light and radio waves

Who cares about an OLED and a notch when your phone can sip power from its surrounding, allowing you to make calls without ever having to charge your phone. This wild cellphone is part of a Google Faculty Research program and received three U.S. National Science Foundation grants for total investment of about $2 million. …

Continue reading “This battery-free cellphone runs on light and radio waves”