I'm predicting ten years for equivalent powered batteries to be about
the size of a thimble.

Nope. Never happen. It is physics, and chemistry. It has to do with the
electrons in the shells that are available to change place and be used as
electricity. Even if you get all of them to change place with 100%
efficiency (which will also never happen) there is a limit to the amount of
charge you can get from a battery.
--
Jim in NC


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