Marketing mumbo-jumbo.
What's a properly-functioning charging system doing if not "looking after the maintenance" of the battery?
And the second part of the quote is amusing as well. Smart chargers
can extend the life of a battery
by as much as three times.
So far in this thread, the guy with the 15 year old battery in his F-150, and the list of 10+ year old batteries I posted myself are pretty much in the lead as far as battery longevity goes. And one of the common denominators in those situations and experiences
isn't the use of a battery maintainer/smart charger.
Not saying there's anything
wrong with such devices, but they aren't necessarily going to guarantee you longer life....unless they're used in an application where the vehicle or equipment sits for extended periods. In those cases a battery maintainer would be a plus, because the factory-installed belt-driven "battery maintainer" isn't able to do the job.