FRIDAY SURPRISE: You'll get a charge out of this

When we think of a battery, we invariably think of the lead, acid, or alkaline components that have become synonymous with the concept. But chemical repositories are not the only ways to store energy; it can also be stored in its kinetic form.

That's the idea behind the mechanical battery.
Read all about it, courtesy of Damn Interesting.

-=[ Grant ]=-
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