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