OER Parts offers a wide selection of Battery Accessories for your 1957 Dodge Royal. OER Parts offers 1957 Dodge Royal Battery Tender, 1957 Dodge Royal Battery Managment System, 1957 Dodge Royal Dual Battery System Controller Set, and 1957 Dodge Royal Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller