OER Parts offers a wide selection of Battery Accessories for your 1990 Cadillac Brougham. OER Parts offers 1990 Cadillac Brougham Battery Tender, 1990 Cadillac Brougham Battery Managment System, 1990 Cadillac Brougham Dual Battery System Controller Set, and 1990 Cadillac Brougham Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller