Extraordinary claims require extraordinary proof. But even given the benefit of the doubt, there is little advantage over alternatives if you don't just happen

Extraordinary claims require extraordinary proof. But even given the benefit of the doubt, there is little advantage over alternatives if you don't just happen to have lots of natural hills/land readily available. A block of concrete has about 2.5 times the density of water and creating one doesn't require any magic chemistry. The land required for a "gravity battery" is only slightly larger than the concrete block itself. https://futurism.com/the-byte/company-builds-facility-lifts-lowers-bricks-store-energy https://futurism.com/the-byte/company-builds-facility-lifts-...