[kybernetikos]

What sort of orders of magnitude are we talking about here? Could you wind a watch with body heat?

[pjc50]

You have to find a way of applying and removing the heat in order to make that happen - for watches I would have thought the normal "self winding" kinetic mechanism was best.

[ncmncm]

They usually say you need 40 degrees of difference. So, probably not.