Dynavolt MG9-4B-C replaces YB9-B Sealed Nano Gel Motorcycle Battery YB9B
Original YB9B. This Gel battery can be mounted in any orientation and EXCEEDS the capacity and cold cranking amperage of the original battery. Dynavolt Nano-Gel Battery, UPGRADE for YB9-B. Dynavolt MG9-4B-C.