Replacing Batteries With Radio Waves

By JDavis | 7/18/10 2:38 PM

A recent article in The New York Times looks at a number of new technologies that use ambient radio waves to provide power for wireless, low-power devices and sensors. Harnessing waves from everything in the air -- cellphone antennas, radio stations, TV towers, WiFi transmitters -- these new technologies are using otherwise wasted energy to power a wide range of low-power sensors.

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