Mighty Max Battery MM-G31M, 12V 110Ah, Group Size 31M Deep-Cycle Marine AGM, Dual-Purpose Starting & Deep Discharge, 825 CCA, 1000 MCA, 240 RC, Spill-Proof Maintenance-Free Battery
Condition: New
$249.99
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Availability:
In Stock.
Arrives
Oct 29 – Oct 31
At a glance
- Condition
- New
- Edition
- Group 31M
- Model
- MM-G31M
- Dimensions
- 13"D x 6.81"W x 9.37"H
- Weight
- 72.5 lb
- Vehicle Service Type
- Boat
- Size
- Standard
- In the box
- Battery
Features 10
- Marine-Grade Confidence: Harness the endurance and dependable energy you need to power every journey on the water, on the road, off the grid, or wherever adventure takes you.
- Dual-Purpose Power: 110 Ah deep-cycle capacity delivers strong cranking power to start your engine and the long-lasting endurance to keep electronics and gear running for hours.
- Strong Starting Advantage: Delivers 825 CCA and 1000 CA for quick, dependable engine starts even in any climate or terrain.
- High Marine Cranking Power: Delivers 1000 Marine Cranking Amps (MCA) to start your engine with strength and reliability, giving boaters superior starting performance compared to standard marine batteries.
- Long-Lasting AGM Durability: Offers up to 700 cycles at 50% depth of discharge, delivering longer life compared to typical AGM marine batteries.
- Built strong for Real-World Conditions: Maintenance-free and spill-proof design delivers steady energy for waves, trails, and off-grid life, built with heavy-duty AGM technology for any rough terrain.
- Tough ABS Protection: Encased in a rugged ABS shell that resists impacts and heat, providing added safety and dependable energy in demanding environments.
- All-Season Versatility: Built to absorb vibration and harsh marine conditions, it delivers dependable power year-round and is ideal for boaters who need strong cranking power and steady energy for electronic accessories.
- Dimensions: Measuring 13.00 x 6.81 x 8.35 in, 9.37in Total Height and weighing 70.70 lbs
- Two-Year Warranty: Built to last and backed by a two-year limited warranty for added protection with every charge.
Specs 22
| Brand | Mighty Max Battery |
|---|---|
| Vehicle Service Type | Boat |
| Size | Standard |
| Voltage | 12 volts |
| Battery Cell Composition | Lead Acid |
| Item Weight | 72.5 pounds |
| Product Dimensions | 13"D x 6.81"W x 9.37"H |
| Battery Capacity | 110 amp_hours |
| OEM Part Number | MM-G31M |
| Automotive Fit Type | Universal Fit |
| Compatible with Vehicle Type | Boat |
| Item Dimensions D x W x H | 13"D x 6.81"W x 9.37"H |
| Battery Type | Lead Acid |
| Brand Name | Mighty Max Battery |
| Manufacturer Part Number | MM-G31M |
| OEM Equivalent Part Number | MM-G31M |
| Model Number | MM-G31M |
| Manufacturer | Mighty Max Battery |
| UPC | 810185371747 |
| Number of Items | 1 |
| Item Type Name | Battery |
| Manufacturer Warranty Description | 1 Year Manufacturers Warranty |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 29 – Oct 31
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Top Amazon Reviews
Poor Packaging & Damaged Box, the battery works.
Edition: Group 31M
I charged the battery for 6 hours plus, before installing. Almost fully charged. The box was previously opened from the bottom, the bottom was not taped at all. The top was poorly taped. The box should be taped with named company tape to help reduce tampering, like Rock Auto does. Not sure if I received a new battery or a used battery, for my new sump pump. Time will tell in the end. I did pick the largest recommended battery for the Zoeller 508 Sump Pump. Group 31 M. This was easy to install, it is advertised as a best value. The battery connects to the pump and a monitor / Alarm. Tested several times and it all worked well. The battery is very heavy.
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Reviewed in the United States on July 25, 2026 by Hard Working American
Pack better !
Edition: Group 31M
Packing wasn’t great but works fine
Reviewed in the United States on September 8, 2026 by Brian mowdy
Great product and will buy again.
Edition: Group 31M
Great product and will buy again.
Reviewed in the United States on September 9, 2026 by Heather Harmon