31DC Marine Battery – Group 31 12V Deep Cycle

Description

Looking for a reliable 31DC flooded marine battery that delivers long-lasting deep cycle performance? The DC-31 is engineered for dependable house power in boats, yachts and RVs.

Designed to handle repeated discharge and recharge cycles, this battery provides steady power for trolling motors, electronics, lighting, pumps and onboard accessories. Durable, vibration-resistant and maintenance-friendly, it’s the ideal Group 31 deep cycle battery.

Compatible With / Replaces

The DC-31 replaces many group 31 marine batteries including:

• 31DC
• 31DC-205
• 31TMX
• M-31DC
• NAU31DC
• NAU31HDDC

Key Features

• Type: Lead-acid / flooded wet battery
• Cold Cranking Amps (CCA): 825
• Marine Cranking Amps (MCA): 1,000
• Reserve Capacity (RC): 200 minutes
• Durable: Vibration-Resistant Construction
• Reliable: Dependable Starting & House Power Support

Specifications

• Length 12.9″ / 328 mm
• Width 6.7″ / 171 mm
• Height 9.3″ / 237 mm
• Weight 59 lbs / 27 kg
• Dual terminals – Auto Post (SAE) and Stud terminal

Applications

• Fishing boats and pleasure craft
• Sailboats and cabin cruisers
• RV house battery systems
• Travel trailers and campers
• Marine electronics, trolling motors, fish finders and lighting systems

Why Choose Our 31DC Flooded Marine Battery?

• Trusted local Canadian battery supplier
• Fresh inventory with strong performance
• Competitive pricing
• In-store pickup available
• Expert advice from real battery specialists

Frequently Asked Questions

How long does a 31DC marine battery last?

With proper maintenance and charging, a quality deep cycle marine battery typically lasts 3–5 years depending on usage and storage conditions.

What Does 31DC Mean?

A 31DC battery refers to Group 31 – Standard battery size (BCI) and DC – Deep Cycle

31DC vs 27DC Marine Battery – What’s the Difference?

27DC batteries are a slightly smaller size, lighter weight and a lower capacity.  31DC batteries are a larger size, have higher amp hour capacity and a longer runtime. If you have the room, a 31DC is the way to go.

Can I use a 31DC battery for a trolling motor?

Yes – a Group 31 deep cycle battery is a great choice to run your 12V trolling motor system. Always verify your motor’s amp draw and runtime requirements before purchase. See our Trolling Motor Battery Guide for more details.

Is a 31DC battery good for RV use?

Yes. Group 31 flooded batteries are widely used as RV house batteries for lighting, water pumps and small appliances.

What’s the difference between starting and deep cycle marine batteries?

Starting batteries deliver short bursts of high power to start an engine. Deep cycle batteries provide steady power over longer periods and handle repeated discharge cycles.