Yet another contender, the carbon lead battery. Predicted by phys.org in 2011:
https://phys.org/news/2011-11-carbon...t-battery.html
Available as a [boat battery] product today:
https://duckduckgo.com/?q=Carbon+foa...sb&ia=products
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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"The Flat Earth Society has members all around the globe" -- The Flat Earth Society
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