I stumbled on an article about this company.
This a very great idea, I don’t know how it can work. But harvesting the body’s heat to make energy to recharge a battery.
If it works with the body’s heat, it could work on the sun’s too, or any other material. This is a promising tech.
If it’s movements, that is wise, since some automatic watch does works like that. But it need to generate much more energy to charge an electronic device, them to power a simple watch.
I wish I could know more.