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