Bought a used beater many years ago with a Walmart Battery. It died well before it's time but try to Warranty a battery in a used car...
Local Salvage yard had some used batteries on the shelf & wouldn't ya know, there is the Maxx. $10.
Best part is that it had the warranty tucked into that little plastic pouch stuck on the side
Took the paperwork with the dead battery & got a pro rated new one, Sent the Ten buck battery down the road with another car