For what he wants to do with it I would get the Stanley 40 amp battery charger or the B&D 40 amp battery charger, I got the later for $50 at Big lots. For 2 6v GC batteries it works great and has an equalizing function and desulfating function. Like a previous poster said none of these smart chargers fully charge the batteries to 100%SOC, so when my smart charger says full I will use the old onboard Magnatec 950 converter charger to top of the 2 6 v GC batteries. There are better solutions but not for $50.
