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this post was submitted on 13 May 2025
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Science
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Looks like you only recover about 70-80% of the electricity. Much less than a chemical battery, but it's also much cheaper to build.
Bonus tho: gravity doesn't degrade as much. And rocks don't contain a lot of dangerous chemicals
These aren't relying on gravity, theyre relying on maintaining a vacuum, and concrete is extremely porous. They're obviously sealing the inside of the chamber, but basically no coatings have a lifetime of 60 years for holding vacuum.
Oh you're right. That's on me for reading while tired.
It's definitely possible to build a structure like this. Even if these prototypes might not be perfect,, I like the idea.