OER Parts offers a wide selection of Battery Accessories for your 1966 Oldsmobile Cutlass. OER Parts offers 1966 Oldsmobile Cutlass Battery Tender, 1966 Oldsmobile Cutlass Battery Managment System, 1966 Oldsmobile Cutlass Dual Battery System Controller Set, and 1966 Oldsmobile Cutlass Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller