Matrix PowerWatch hands-on: The promise of a world without chargers
 

When Matrix co-founder Douglas Tham handed me my review unit of the PowerWatch, I had to fight the instinct to ask for a charger. This thermal-powered wearable doesn't need one -- it gets energy by converting your body heat into electricity. It's bee...

https://www.engadget.com/2017/11/09/...dy-heat-power/