Optima Batteries 8051-160 D31A YellowTop Dual Purpose Battery (need to remove steel stud) : 12-Volt, 900 Cold Cranking Amps, Size: 12 13/16" x 6 1/2" x 9 3/8" tall, Weight: 59.8 pounds, SAE Post type. Reserve capacity of 155 minutes for constant performance Optimal starting power even in bad weather Fifteen times more resistant to vibration for durability This item is not for sale in Catalina Island C20 Capacity - 75 Amp Hour