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The Orange Power Welly Uses Feet Heat to Charge Your Phone

 - Jun 8, 2010
References: recombu
The Orange ‘Power Welly’ is a boot designed to charge phones on the go. The boots are capable of converting the heat from your feet into an electric current, so the hotter your feet get, the most energy you produce.

The Orange Power Welly contains a power-generating sole with thermoelectric modules constructed of semiconductor materials that form thermocouples. These are laid between two thin ceramic wafers and the top side of the boot receives the heat while the bottom receives coldness from the ground to generate electricity.