OER Parts offers a wide selection of Battery Accessories for your 1981 Pontiac Catalina. OER Parts offers 1981 Pontiac Catalina Battery Tender, 1981 Pontiac Catalina Battery Managment System, 1981 Pontiac Catalina Dual Battery System Controller Set, and 1981 Pontiac Catalina Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller