Optima BlueTop D31M AGM Battery

Blue Top D31M AGM Marine Battery – 12V 75Ah 900CCA Dual Purpose Starting & Deep Cycle Battery

The Blue Top D31M is a high-performance AGM marine battery engineered to deliver powerful engine starting performance alongside reliable deep-cycle capability. Built using advanced spiral cell AGM technology, the D31M provides strong cranking power, excellent vibration resistance and longer service life compared with traditional flooded marine batteries.

Designed for demanding marine environments, the sealed AGM construction eliminates spills and resists terminal corrosion while allowing installation in multiple orientations. With higher capacity and reserve power than smaller models, the D31M is well suited to vessels requiring dependable starting performance while supporting onboard electronics, trolling motors and auxiliary loads.

Key Features:
• Dual-purpose design – engine starting and deep-cycle capability
• High cranking performance for reliable engine starting
• Spiral cell AGM construction for enhanced durability
• Maintenance-free sealed battery design
• Exceptional vibration resistance for marine environments
• Spill-proof design suitable for multi-angle installation
• Longer storage life for seasonal marine use

Technical Specifications:
Voltage: 12V
Capacity: 75Ah
Cold Cranking Amps (CCA): 900A
Marine Cranking Amps (MCA): 1125A
Reserve Capacity: 155 minutes
Dimensions (L×W×H): 324 × 165 × 237 mm
Total Height: 237 mm
Weight: 27.1 kg
Terminal Type: Twin terminal

Special Features:
Absorbed Glass Mat (AGM) construction, Spiral Cell Technology®, vibration resistant design, corrosion resistant terminals, integrated carry handles and fully sealed maintenance-free operation.

Ideal For:
Marine starting batteries, dual-purpose start/house battery systems, offshore electronics, trolling motor support, trailer boats and high-vibration marine installations.

The Blue Top D31M provides powerful starting capability and reliable AGM deep-cycle performance, delivering durable and maintenance-free power for demanding marine electrical systems.