https://newatlas.com/electromagnetic-harvester/26130/
The handheld Electromagnetic Harvester allegedly charges a AA battery using just the electromagnetic fields given off by gadgets, power lines, vehicles, and...
electromagneticharvesterclaimschargebatteries
https://www.sciencedaily.com/releases/2013/02/130214075629.htm
A new type of nanoscale engine has been proposed that would use quantum dots to generate electricity from waste heat, potentially making microcircuits more...
quantum dotenergy harvestersciencedaily