- #106
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According to OP
![Smile :smile: :smile:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Don't we already have these? The energy source is the Sun and instead of "gravity battery" we use the name "hydroelectric plant." No gearing or pulleys needed; evaporation and condensation do the trick.CBWB said:A 'gravity battery' could be created by using an energy source to slowly lift a large weight (using gearing or pulleys), then discharged by lowering the weight to run a generator when needed. Kind of like a giant grandfather clock.