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RCA's Charger Draws Electricity From WiFi Signals

In Pictures: The Most Promising Tech Of 2010
By , Jane McEntegart, Kevin Parrish, Marcus Yam, Tuan Nguyen
RCA's Charger Draws Electricity From WiFi Signals

Although it doesn't sport 3D capabilities, a high-contrast ratio, or dual touch screens, RCA's little Airnergy Charger should have earned an award for innovation. This device acquires a charge by pulling electricity from WiFi signals. RCA said that the speed of recharging depends on the location of the WiFi hotspot—the farther away, the longer it takes.

The current version takes a while to recharge a cell phone (90 minutes or more). Still, it's a step in the right direction in finding new ways to use energy.

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