Wristband that turns body heat into electricity can power an LED

Body temperature could one day be harnessed by wristbands to power smartwatches

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A wearable wristband containing a thermoelectric generator (TEG) can convert body heat into enough electricity to power an LED. In future, the technology may be able to power smartwatches and end the need for traditional charging hardware.

“Energy supply is always a big issue, and this could help alleviate the energy crisis,” says Qian Zhang of the Harbin Institute of Technology, China, one of the co-authors of the paper, who has worked on TEGs for more than 15 years.

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