I have Optima batteries on all six of my old Fords. All are 6-volt except for 12-volt in my ’34 roadster and I have purchased all of them from Amazon. What I like about them is that they hold their voltage much longer than standard wet cell batteries, they don’t leak acid, you can lay them on their side and they seem to crank the engines a little faster. I have never felt that I needed a maintenance charger on any of them.
The only problem that I ever had with an Optima battery was that one of three large 12-volt batteries that I bought for starting my Diesel motorhome, failed in less than 18 months. When I called Amazon (and got to the right person), they sent me three new ones at no cost. I was told that I didn’t need to return them, and one now resides in my ’34 roadster. The other one comes in handy to have around at times.
Robert