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Re:Ditch the Batteries: Off-Grid Compressed Air Energy Storage by hedora on Thursday May 24, 2018 @10:12AM (#17144116)
I thought this too, but read the rest of the article.

Spoiler alert: State of the art is 30x better

Re:Ditch the Batteries: Off-Grid Compressed Air Energy Storage by test6554 on Thursday May 24, 2018 @10:41AM (#17144403)
I picture Rick Moranis operating a large space-based vacuum cleaner.