Batteries, despite their ability to produce electricity on call, don’t actually have electricity inside them, instead they are full of chemicals. Under the right conditions these chemicals can be coaxed into a reaction that causes chemistry to produce electricity. In order to work, each of a battery’s two “terminals” has to be made from a different kind of metal separated by an electrolyte. Any number of things can serve as an electrolyte, from soda pop or a potato to sulfuric acid or even ceramic, though various kinds of salts and acids generally work best. Regardless of which electrolyte and
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