Good point, but if battery is kept full charged at most times, normal use, then you should not loose capacity much.
It's mostly when the battery is drained low and let set for weeks or months or longer that most capacity is lost. Like I go out and try to crank a car or truck in the yard not started for weeks or months, takes lots of cranking on those old carburated things with manual pumps, I get them running (or not) and battery is ran down, then let them sit for weeks or more with a low battery. Sulphation works in and capacity is lost, next try after charging maybe half the cranking time?
Kept full charge I seldom had such problems with lost capacity on said cars and trucks.
Keeping 30 batteries full charged for months of non-use is not so great either, so I let them sit till I want them and they sulphate from self discharge, computers, clocks and other power eating things! I used to take better care of such things, last year or two I just said heck with them, start them once in 3-4 months, forget about the batteries altogether, let the tires dry rot on flats, etc..
Also another reason why I think pulse charging works even if some say it don't. With over 30 cars in the yard I know the ones that should not start and the ones that should!
After pulse charging some old batteries for a bit I crank and crank cars far longer than I should be able too with some old and abused batteries.
Then I have some newer old batteries with less abuse, never been pulsed and they crank 2 minutes and shot!
I just got a free replacement for a 2 year battery, It would not hold a charge, run it dead fast after a minute or so etc... was like 18-20 months old when it gave me problems at first, so I just took it back for a new one. I maybe could have done some tricks to it as I did others, but why bother. I got another NEW 2 year free replacement battery, if I had revived the old one for another year I would still have lost out, I got another 2 years with this new one for sure, longer it if it lasts longer. if it dies in 20 months, well then I get another free 2year
Really as it goes right now, if a battery dies every 20 months, I can live forever and never buy a new one
20 months and get a free 24 month battery that lasts 20 months, then get a free 24 month again, a great cycle I think!!! I almost hope none of these replacements ever last more than 18-20 months as long as they replace them free with a new 24