Page last updated at 12:23 GMT, Thursday, 23 July 2009 13:23 UK

Wireless electricity harnessed


Researchers have successfully tested an experimental system to deliver power to devices without the need for wires.

The approach, demonstrated by US firm Witricity, exploits simple physics and could be adapted to charge other devices such as laptops. Rory Cellan-Jones reports.

First broadcast 8 June 2007.

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