Quote:
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Instead of lithium, the new batteries store electricity in gold nanowires. The original aim of the experiment was simply to make a solid-state battery that used an electrolyte gel rather than a liquid to hold its charge - lithium batteries contain liquid, which makes them extremely combustible and also sensitive to temperature.
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Batteries "typically die in dramatic fashion after 5,000 or 6,000 or 7,000 cycles at most [...] testing showed that the new system could withstand 200,000 charge cycles over three months and only lose 5 percent of its capacity."
I actually wondered if this was Unicorn Corral material, but it linked to Popular Science, which pretty much had the same article:
Researchers have accidentally made batteries that could last 400 times longer - ScienceAlert
If they ever did die, there would be places saying "We buy gold batteries!"