Thermoelectric wearable. Harvest waste body heat, power your day.
Your body sheds heat all day and none of it does anything. Meanwhile the watch and the phone both need charging.
A three-part system that turns body heat into stored, usable power. A coat clip module captures heat at the jacket opening: the warm side sits inside the coat, a thermoelectric generator in the middle, and a finned cool side is exposed to outside air. A watch band with a skin-contact plate and exposed heat spreader supplements watch power. Both feed a slim pocket battery with a harvesting circuit, rechargeable cell and USB-C output for the phone.
Note Body-heat harvesting is low power. Phone charging relies on stored energy and conventional recharging.
Measuring real TEG output at the coat opening across a winter day.