I bought a Kubota
B3030 back in 2005. It has 682 hours on it now and I am still starting reliably with the original factory supplied wet lead acid battery that is
fourteen years old !!!
I would have thought that was impossible considering extended parked times but when parked it is always plugged into a
'smart' CTEK MUS 4.3 battery charger maintainer. The CTEK incorporates pulse charging that aids in the desulphation process keeping the lead plates in a younger state if not like new.
These desulphation chargers work. I have eight of them so that all parked batteries (farm, marine, auto, mc) are properly maintained. At around 80 bucks each it may sound expensive but I haven't bought a replacement battery in over 14 years. If you do the math you'll see the savings

.
This thread initially asked about
reconditioning mode which I have had to use on my underrated motorcycle AGM battery (but not the tractor ... yet

) to eke out
nine years of service so far. In the spring when riding season begins I will try reconditioning again but I fear it may be near the end. The average battery lifespan for my 80 cu.in. V-Twin is 3 years! My lawnmower has a bigger AGM battery cranking a 45 cu.in. V-Twin (less cranking load) and with the aid of reconditioning has completed
eight years of service and is looking good for another season at least. I mention V-Twin because in the case of my mc the cranking load is higher than the average american V8

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