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Batteries have been around for over 200 years but it was only with the invention of the telephone and telegraph that they found practical applications. Flashlights and radios soon followed. Most batteries were non-rechargeable and needed refilling of electrolyte or replacement when depleted. The first rechargeable battery was the lead acid invented by Gaston Planté in 1859.
9 slides PowerPoint
Last updated 2016-03-03
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