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Power from the Air

by Mark Harris

Internet devices powered by Wi-Fi and other telecommunications signals will make small computers and sensors more pervasive.

Even the smallest Internet-connected devices typically need a battery or power cord. Not for much longer. Technology that lets gadgets work and communicate using only energy harvested from nearby TV, radio, cell-phone, or Wi-Fi signals is headed toward commercialization.

Read more on technologyreview.com.

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