OER Parts offers a wide selection of Battery Accessories for your 1978 Pontiac Bonneville. OER Parts offers 1978 Pontiac Bonneville Battery Tender, 1978 Pontiac Bonneville Battery Managment System, 1978 Pontiac Bonneville Dual Battery System Controller Set, and 1978 Pontiac Bonneville Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller