No wires, either!  A system that can deliver power to devices without the need for wires heralds a revolution in how we use and manage electricity

The technique, which has been shown off at a hi-tech conference, exploits simple physics and can be used to charge a range of electronic devices over many metres.

Eric Giler, chief executive of US firm Witricity, showed mobile phones and televisions charging wirelessly at the TED Global conference in Oxford.

He said the system could replace the miles of expensive power cables and billions of disposable batteries.

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