OER Parts offers a wide selection of Battery Accessories for your 1985 Oldsmobile Firenza. OER Parts offers 1985 Oldsmobile Firenza Battery Tender, 1985 Oldsmobile Firenza Battery Managment System, 1985 Oldsmobile Firenza Dual Battery System Controller Set, and 1985 Oldsmobile Firenza Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller