On Thu, 20 May 2021 09:34:52 +0100, Ian Jackson
wrote:

snip

There's also the problem of standardization. If they're like watch
batteries, there will be hundreds of 'standard' sizes and voltages.

There could be , or might be 'a few', like the connectors for phones
'now' are typically uUSB, USBC or whatever solution Apple comes out
with next. ;-)

So given many car brands are now owned by one parent company, or
co-developed with others, there is no reason why all those models
couldn't have the same pack? It may end up like VHS (Ford), Beta (GM)
and Laserdisk (Apple) with one winning in the end. ;-)

And say they did a 'L/M/S' range of packs, the S would be the size
supplied with an urban runaround and the M might be fitted to the same
size / weight as the runaround but 'sports' models.

Cheers, T i m