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Charge your mobile phone with *nothing*

Of course, not really “nothing”. But nothing more than a WI-FI net: RCA released the Airnergy power system, that harvests energy from Wifi-Signals:

You don’t have to connect to a network, you just have to be in a place that has signal, and it will automatically charge up. As if we weren’t intrigued already, they told us that they’re planning on building the tech into actual cellphone batteries, so you would theoretically never need to plug in again and your device would always be topped off. Yeah, we want.

http://www.engadget.com/2010/01/09/airnergy-wifi-power-system-gives-rca-a-reason-to-exist-video/

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