Thieves are going to go after things that are much easier to transport, or much more valuable, than a lead-acid battery. You're not exactly going to be making a quick getaway lugging a 70lb RV battery, and they are only worth about $15 each at the scrapyard.
I like the fatmax idea because there's nothing for the battery to short out against, and it won't corrode from the hydrogen gases.
Putting 10-ply tires on half ton trucks since aught-four.