World's First Battery Less Phone Invented - Check Video

Battery Free Phone works by using Harvesting ambient power

                        

 We gift the primary battery-free cellular phone style that consumes only some micro-watts of power. Our style will sense speech, actuate the earphones, and switch between uplink and downlink communications, all in real time. Our system optimizes transmission and reception of speech whereas at the same time gather power that allows the battery-free cellular phone to work endlessly. The battery-free device image is constructed using commercial-off-the-shelf elements on a computer circuit board. It will operate power that's harvested from RF signals transmitted by a basestation 31 feet (9.4 m) away. Further, victimization power harvested from close lightweight with small photodiodes, we have a tendency to show that our device will communicate with a basestation that's 50 feet (15.2 m) away. Finally, we have a tendency to perform the primary Skype call using a battery-free phone over a cellular network, via our custom bridged basestation. This we have a tendency to believe may be a major leap within the capability of battery-free devices and a step towards a totally functional battery-free cellular phone.

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Source:www.washington.edu