Thermal powered smartwates are nothing more than gimmicks.

Dave runs the numbers on the Matrix Powerwatch from Indieigogo.

Also some exercise testing shows up an unusual and undesired effect when using thermoelectric generators on your wrist.

Thunderf00t’s video HERE

Bluetooth Power Consumption Application Note HERE

The Peltier effect TEG used in the experiment HERE

The Wurth Energy Harvesting Kit HERE

Forum HERE