Another FWIW, my local Wal-mart has a "returned battery" section. They have sheets taped to them showing that they passed various tests. Normally I wouldn't even contemplate something like this, but they are half price. Couldn't resist one for the mower at $10 lol.
I bought 2 of Walmart's $20 lawn tractor batteries in march of 2015--one died already,on my tractor I use to mow with only--while it did sit all winter,I put the charger on it every month to keep it charged..
My old tractor has a starter/generator,not your typical "car" style starter,which do draw a heavy load to start an engine,and doesn't put out much amps as far as recharging it,but the battery should have lasted longer in my opinion..many times it died when I went to start the tractor "cold" and had to jump it..
They only offer a 90 day warranty on tractor batteries..
I know many lawn tractor batteries die after a year or two,but I've seen some go over 5 years and were pretty much neglected the whole time..
If Johnson Controls still makes Walmart's "Ever-Start" tractor batteries,they aren't what they used to be--I read Exide is who now supplies Walmart,I see that brand there along side of the Ever-Start ones for vehicles at the store near me now..
I never liked Exides,never had good luck with them..
The Duralast mis-matched batteries that were in my diesel pickup in 2003 when I bought it are still in it and starting it--though last winter they did die a few times when it was sub-zero and I hadn't driven the truck hardly at all.."made in mexico" stickers on them too!..
I do not know the production date on either one,but they looked a few years old when I got the truck!--guy I bought it from got them used,from a salvage yard..and it didn't get driven much until it became my daily driver in 2014..
I've said it before here--ANY battery you buy is a crap shoot lately..you may get a good one that lasts a decade,or one that craps out in a year..they use recycled lead and the cheapest stuff in most of them,so its a gamble if they'll last,no matter who's name is on the label..
I have not ever had an Optima,and after what I've read online and seen first hand in friends vehicles that tried them ,I would not waste money on one...they go dead if they sit over a week ,is the most common fault I see most often..too expensive for my budget too,I'd rather buy two "regular" lead/acid batteries for the same price as one spiral cell..