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Fully Charged in Just 12 Minutes! Korean Scientists Develop Next-Gen Lithium–Sulfur Battery
(scitechdaily.com)
This is a most excellent place for technology news and articles.
What are you referring to when you say "salt batteries"?
https://en.wikipedia.org/wiki/Molten-salt_battery
Be pretty hard to put a molten salt battery in a cellphone or electric vehicle...