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