OER Parts offers a wide selection of Battery Accessories for your 1966 Dodge Wm300 Power Wagon. OER Parts offers 1966 Dodge Wm300 Power Wagon Battery Tender, 1966 Dodge Wm300 Power Wagon Battery Managment System, 1966 Dodge Wm300 Power Wagon Dual Battery System Controller Set, and 1966 Dodge Wm300 Power Wagon Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller