Japanese are good at miniaturizing things. Japanese researchers have made up a tiny coin side kinetic battery capable of generating more energy than than its previous version.
Only the slightest vibrations, the tiny device generates 22 milliwatts — 20x more than its predecessor.
This happened because of the use of Galfenol, a magnetic material developed by the US Naval Research Laboratory in 1998 highly resistance to temperatures over 1,200 degrees Fahrenheit.
Src: [Tech On]
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