On Saturday, 22 August 2020 17:27:53 UTC+1, harry wrote:
https://www.youtube.com/watch?v=_QLEERYS5C8
A single flywheel would surely equate to a cell, not a battery? (And certainly not a bettery. We have far too many gambling ads already.)
The very term "mechanical battery" looks like a lame way of making a well-known, long-established and understood technology, with many good uses, sound like it is a new competitor.