Has anyone had a less than favorable experience with JD "strongbox" batteries ? I purchased 2 sets (4 6v batteries) for a 4640 and 7720 and can't seem to get more than 3 seasons out of them. As expensive as they are ( $ 150.00 ea. at my local dealer) I feel like they should last better than that. I found an alternative battery
manufactured by Johnson Controls that are sold under several brand names but have the same spec. as an Interstate branded battery for half the money. I'm going to try them and see what happens.