D31M Replacement Battery For Optima Marine Deep Cycle

Unleash the Banshee this year with the new Group 31M deep-cycle marine battery with dual terminals. Banshee batteries are designed to withstand rigorous deep charges as well as long slow recharges. The Banshee marine deep-cycle battery is a direct replacement for Optima D31M batteries and guarantees excellent recharge capabilities for long lasting performance.

Banshee marine batteries are produced and manufactured using only the most up to date materials. All Banshee group 31 batteries have a built in Hydrometer which easily tells the current state of your battery life and is completely sealed so there is never a need to add water. Our group 31 marine battery is rugged, powerful, resilient, and should be the only battery you rely on for cranking, igniting, and lighting.

The advantage of buying Banshee Marine Batteries is that they have more battery plates. More battery plates mean more plate surface area. That means that the Banshee battery has more power – twice as much as conventional batteries.

Banshee batteries are capable of providing engine cranking As good as any other battery equally sized, even at very low temperatures. And they can handle 400 charge-discharge cycles to 80% depth of discharge.

Enhanced Flooded Battery or increasingly referred to as EFB technology in the market can not be installed on its side or upside down. EFB batteries are an enhanced version of standard wet-flooded technology. The primary benefits of EFB technology are improved charge acceptance and greater cyclic durability when operating in a reduced state of charge (typical of Stop Start applications).

                             Banshee Batteries  vs. spiral wound designs: 15% more plate surface area! 

Banshee Marine Series batteries outperform every other brand of batteries on the market including spiralwound batteries, because their densely packed plates eliminate the “dead space” between cylinders in spiral designs.

Voltage: 12

Amp Hours: 105Ah

Cold Cranking Amps: 800

Group Size: BCI: 31

Reserve Capacity @25 Amps: 190

C20 Capacity: 105Ah

Internal Resistance: 5m

Dimensions: 13in x 6.7in x 9.4in

WEIGHT: 52.91 lbs

Key Benefits



• Maintenance-free