Pamela wrote:

There's a brisk trade in replacement batteries for phones only a few years
old which have lost a lot of capacity. Mine lost 10% capacity in 9 months
from new.

I think the last phone I bought a replacement battery for was a Sony K800i.

My previous phone ran out of updates after google's 3 years, was still
getting a day and a half per charge, dad's still using it over a year
later.

The phone before that only lived just over a year, but that was due to
interaction with a washing machine ...