MasterVolt 62002250 AGM Group Dual-Purpose Sealed Marine Battery Batteries - 12/225 8D 225Ah 12V

The MasterVolt AGM 12/225 (Group 8D) is a heavy-duty, 12V 225Ah sealed Absorbed Glass Mat (AGM) marine battery engineered for demanding on-board applications. Utilizing advanced glass-fiber technology, the electrolyte is fully absorbed within the mat separator, eliminating free liquid, preventing spills, and requiring zero maintenance throughout its service life. With no gas formation under normal operating conditions and no ventilation requirements, this battery can be safely mounted in any orientation or location aboard your vessel.

Designed as a true dual-purpose battery, the AGM 12/225 delivers both reliable engine-starting performance and sustained service power. It provides powerful high-current bursts for starting engines, operating bow thrusters, and running winches, while also handling cyclical service loads such as onboard lighting, electronics, and entertainment systems.

Key Features:

• Dual-purpose design — handles both starter and service/house battery functions in a single unit
• 225Ah capacity (C20 rating) — large reserve capacity for extended onboard power
• 1,300A CCA (SAE) / 815A CCA (DIN) — exceptional cold cranking performance for reliable engine starts
• Glass-fiber AGM technology — low internal resistance for rapid, high-current discharge
• Thicker plate construction — extends overall battery lifespan and supports medium cyclical use
• Maintenance-free and sealed — no water additions, no corrosive fumes, and spill-proof
• Universal terminal compatibility — removable M8 battery poles are compatible with all standard battery terminals
• Winter-ready — maintains first-rate condition even after extended storage
• Compatible with 3-Step Plus charging — works seamlessly with MasterVolt chargers and other standard multi-stage chargers
• Maximum charge current: 63A
• Two-year manufacturer warranty

The MasterVolt AGM 12/225 is a direct upgrade over conventional flooded lead-acid batteries — the AGM 12/90 delivers the same initial power surge as a 180Ah flooded battery, and the 12/225 scales that advantage further into Group 8D territory. Whether replacing an aging wet battery bank or building out a new marine electrical system, this battery offers superior reliability, safety, and longevity in a robust sealed package.