Once again the US government sells the population down the toilet
All Australian batteries come with a government mandated 12 month replacement warranty
Most then will add a further 1 to 3 years of pro-rata warranty.
Mower batteries should have thicker plates with 2 connections per plate to support it properly.
Car battery plates are held to the battery by a single tab on one corner because cars have suspension & smoother multi cylinder engine .
Down here Toro fitted spiral cell batteries which are mechanically the strongest , they are also the most expensive .
So if you want a good battery that will last as long as your mower does then find a spiral battery to fit in the space
Buy a battery with a minimum of 250 CCA (cold cranking amps).
New chargers will not recognize and begin charging batteries that are below 12 volts. Unless you have a charger like a Noco that will charge from one volt up. Use a multimeter and see how many volts you have. 12.75 is a fully charged battery. Obviously this doesn’t put a load on battery.
Use a 2 amp trickle charger once a month to charge battery, whether using equipment or not. Should get 4-5 years out of battery if maintained correctly.
Batteries today, lead acid, AGM, or lithium are very good and priced fairly for what they do. If you don’t keep them charged and kill them a few times, it will severely shorten or end their life.
Tiger, I thought I'd been keeping it charged, or so I thought. Maybe the cold snaps 24F knocked it down. I left it on overnight, even though it showed to be not charging at all, and its back up now. 12.6v. I think maybe that charger kicks on a little bit when a battery is down so low, and then kicks off and when it does kick on its at 2amp. Overnight, I guess it did that enough that its up and going now.
Bert, don't get me started on our federal government here. lol. They are the cause of so many problems here in the US. The congress created hundreds, yes hundreds of federal agencies over the decades to "regulate" this or that. They make up their own rules, too often by radicals that gravitate in to positions of authority, which is why they applied for or were appointed to those positions. They pass their "rules" and in effect become law even though congress never passed a law, thereby the politicians can wipe their hands clean of it all. Some of its probably good; a lot is not good for the average citizen. I've been through that myself many years ago with the EPA "rules".