Deka/East Penn 9AGM49 12-volt Ultimate Advanced Generation Battery Meets OEM AGM requirements for exact fit replacement. Electrolyte absorbed by micro-porous glass separators eliminates acid spills and terminal corrosion. Tightly "packed" construction and calcium reinforced grids provide greater resistance to shock and vibration. True maintenance-free performance means longer life with hassle-free service. Superb dual purpose design delivers excellent starting and accessory power.