OER Parts offers a wide selection of Battery Accessories for your 1973 Cadillac Fleetwood. OER Parts offers 1973 Cadillac Fleetwood Battery Tender, 1973 Cadillac Fleetwood Battery Managment System, 1973 Cadillac Fleetwood Dual Battery System Controller Set, and 1973 Cadillac Fleetwood Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller