Gadget Charger Harvests Wireless Power
June 9th, 2009 by terrawatt

Emerging technology: “Ambient electromagnetic radiation–emitted from Wi-Fi transmitters, cell-phone antennas, TV masts, and other sources–can be converted into enough electrical current to keep a battery topped up, says Markku Rouvala, a researcher from the Nokia Research Centre, in Cambridge, U.K.

“Rouvala says that Nokia’s prototype can harvest up to 50 milliwatts of power–enough to slowly recharge a phone, or keep it running in standby mode. “You can basically have it on standby indefinitely,” he says.

“Historically, energy-harvesting technologies have only been found in niche markets, powering wireless sensors and RFID tags in particular. If Nokia’s claims stand up, then it could push energy harvesting into mainstream consumer devices.

“Nokia is being cagey with the details of the project, but Rouvala is confident about its future: “I would say it is possible to put this into a product within three to four years.” ”

Full article: http://beta.technologyreview.com/communications/22764/

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