No.11060866 ViewReplyOriginalReport
Why don't they just use really heavy objects as batteries? You use a motor to lift it up and then release it to drive a motor on the way down.
Is it the chemical battery mafia? Seems like a conspiracy going on here to me.
Heavy objects are not uncommon compared to rare earth elements.

People talk about solar generating too much during the sunniest days, why not just lift big rocks up with it?