OER Parts offers a wide selection of Battery Accessories for your 1974 Dodge RM400. OER Parts offers 1974 Dodge RM400 Battery Tender, 1974 Dodge RM400 Battery Managment System, 1974 Dodge RM400 Dual Battery System Controller Set, and 1974 Dodge RM400 Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller