OER Parts offers a wide selection of Battery Accessories for your 1977 Mercury Bobcat. OER Parts offers 1977 Mercury Bobcat Battery Tender, 1977 Mercury Bobcat Battery Managment System, 1977 Mercury Bobcat Dual Battery System Controller Set, and 1977 Mercury Bobcat Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller