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Even though they power many of our modern conveniences, batteries have a long history. Hank explains how and why these marvels work and what they've been used for over the past 2,000 years!
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engineering.mit.edu/live/news/...
chemwiki.ucdavis.edu/Analytica...
batt.lbl.gov/what-is-a-battery/
electronics.howstuffworks.com/...
• How to Make a Lemon Ba... -- scishow lemon battery
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