Electricity from body heat

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New circuits transform body heat such as that of a hand into electricity. Fraunhofer IIS
New circuits transform body heat – such as that of a hand – into electricity. © Fraunhofer IIS

Making calls from a cell phone with no battery, using just the warmth of your hand? Perhaps that’s no more than a pipe dream right now. But new circuits are already making it possible to harness body heat for generating electricity.


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