On Mon, 03 Jun 2019 09:03:13 +0100, Steve Walker wrote:

On 03/06/2019 04:18, rbowman wrote:
On 6/2/2019 10:06 AM, Commander Kinsey wrote:
With something as common as cars, competition would make the price
sensible. The point is you might get an old battery one day, but you'll
get a good one the next. And you never have a huge outlay to buy a new
one.

As long as the old battery didn't die ten miles from your destination.

Built in monitoring would report the battery's maximum capacity and
other stats each time it was charged and it would be taken out of
service when it fell below a defined capacity. That level could be set
as an industry standard or even a legal limit, just as petrol from
different companies has to meet certain requirements.

Indeed.