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a strong magnet inside a copper coil to generate electric energy from the shaking ... while walking
keep the magnet bouncing for longer to extract a bit more energy
"Liquid metal" material
... so called "Liquid metal" material coating inside to minimize energy loss ...
I have a small torch that is powered by shaking a magnet up & down through a coil in the handle to charge a small battery. It is a bit of a novelty, as the amount of shaking to produce a decent light for a useful time makes it quite impractical.
"Liquid metal" material coating inside to minimize energy loss and keep the magnet bouncing for longer
how much electric energy be extracted in best case scenario?
One of the first commercial uses of Liquidmetal was in golf clubs made by the company, where the highly elastic metal was used in portions of the club face. These were highly rated by users, but the product was later dropped, in part because the prototypes shattered after fewer than 40 hits.
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