Porgy Tirebiter wrote:
The problem is that the "show hims" are nitpick items that won't matter
either way to the people here. It's the old issue of two answers, both
"technically correct" but conflicting. A lot of them vary because of the
conditions of use:

Fixed vs mobile-
Fixed installations can have much more elaborate charging systems. fixed
installations often have individual "2 volt" cells as well that can be
individually monitored.

Battery type-
Plain "flooded" lead acid, calcium enhanced, flat plate, rolled plate,
gel cell, sealed lead acid, deep cycle glass mat.... and more . Each
type has different "optimal" float and equalize voltages. Some types
must be current limited on charge.

There's more, but I digress.

Those nitpick items are for optimal life and performance. Cells and
batteries (a battery is just a group of connected cells) can last 20
years or more under these "optimal" conditions. Automotive use isn't
optimal. Getting more than 3-4 years is quite good life. I've been able
to get 6 years on one vehicle but less than 3 on another. The 3 year
battery was in a vehicle that hat severe underhood heat issues.