My 6v Optima gel (AGM) battery has been reliable since 2007.
Same price at Walmart - free shipping and no core charge.
I use 2-gauge battery cables (and 2 gauge body ground straps/cables).
I sometimes do not start-up and run my 6v 1954 Suburban for over a year.
The engine starts up quickly.
My bigger concern is fuel in the carburetor (after sitting a long time). So far, not problems there.
