Pocket and Sleeping Bag Can Charge Your Phone

Forget searching for charging outlets and plug points, you can now charge your phone with body heat and a sleeping bag or pocket in your clothes. Vodafone revealed this week the wearable Power Pocket charger.

It works by using technology called thermocouples, pairs of thermoelectric material designed to be small and flexible enough to stitch onto clothing. A number of them are printed and then connected together to create the "pocket."

Stephen Beeby, professor of electronic systems at the University of Southampton, said in a statement, “One side of that is cold and the other is hot, and when you get a flow of heat through it you can create a voltage and a current. Voltage and current together equals electrical power.”

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