OER Parts offers a wide selection of Battery Accessories for your 1973 Pontiac Catalina. OER Parts offers 1973 Pontiac Catalina Battery Tender, 1973 Pontiac Catalina Battery Managment System, 1973 Pontiac Catalina Dual Battery System Controller Set, and 1973 Pontiac Catalina Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller