OER Parts offers a wide selection of Battery Accessories for your 1989 Dodge Ram 50. OER Parts offers 1989 Dodge Ram 50 Battery Tender, 1989 Dodge Ram 50 Battery Managment System, 1989 Dodge Ram 50 Dual Battery System Controller Set, and 1989 Dodge Ram 50 Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller