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