Xtreme Volts Sealed AGM Battery XB12A-A, Replaces YB12A-A Xtreme Volts Absorbed Glass Mat (AGM) Batteries Are Premium Quality, Sealed, Activated, Maintenance Free, and ready to install. One Year warranty against manufacturer defects. Live Technical Support and Customer Support toll free at (888) 561-7100. Same day shipping. Free upgrade to USPS Priority shipping. Xtreme Volts AGM batteries are maintenance free, factory sealed against fumes, hydrogen venting, leakage, and are non-spilling even if damaged. Designed to withstand shock and vibration better than conventional batteries. Xtreme Volts AGM batteries have a lower self discharge rate, so they can be stored longer without charging, and are more resistant to freezing than conventional batteries. Premium quality sealed battery produced by ISO 9001 certified manufacturer.