The Yuasa YuMicron gives you a powerful advantage. Its high technology separators allow two extra plates per cell to be installed, for a 30% improvement in cranking performance. The Power Advantage This added power is an outstanding benefit for heavily accessorized machines or high compression engines. Its high cranking power is also a real bonus for easier starting. MUST PURCHASE ACID SEPARATELY. Heavy duty polypropylene case and cover heat sealed together. Patented sealed posts. Containes sulfate stop to retard sulfation on plates.