Turning heat into electricity

Clickbait again!?

Should read: Scientists make incremental improvement in technology that has been around for a century, and has niche uses in special applications.
 
No clickbait, but headline is wrong. Heat iself is useless. "Turning heat gradient..." is correct.

Peltier effect devices were used for transfering heat out of CPU/GPU's to the radiator for some time. However not many people know that Peltier effect is reversive and can also generate electricity.
 
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