OER Parts offers a wide selection of Battery Accessories for your 1986 Oldsmobile Calais. OER Parts offers 1986 Oldsmobile Calais Battery Tender, 1986 Oldsmobile Calais Battery Managment System, 1986 Oldsmobile Calais Dual Battery System Controller Set, and 1986 Oldsmobile Calais Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller