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