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
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Availability:
Only 6 left in stock, order soon!
Arrives
Jun 1 – Jul 3
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Edition: Group 31M
Features
- 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.
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
Automotive Fit Type: Universal Fit
Manufacturer: Mighty Max Battery
Compatible with Vehicle Type: Boat
Voltage: 12 Volts
Battery Capacity: 110 Amp Hours
Automotive Fit Type: Universal Fit
Size: Standard
Item Weight: 72.5 Pounds
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
Model Number: MM-G31M
Manufacturer: Mighty Max Battery
UPC: 810185371747
Item Type Name: Battery
Manufacturer Warranty Description: 1 Year Manufacturers Warranty
Included Components: Battery
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jun 1 – Jul 3
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Edition: Group 22NF NB
Almost 2 years old since i bought this. Its spent plenty nights in a battery box sitting in my truck during freezing nights, and its still taking charge and holding voltage just fine. battery tech changed a lot since i bought this, so i probably wouldnt buy again or use for a trolling motor any more, but im still getting use out of this for running a heavy duty 12v tire inflator. Depending on price...it might be a good choice for many uses and projects.
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Reviewed in the United States on March 5, 2026 by chris
Edition: Group 22NF NB
I bought this for my kayak for which I have built a transom to add a trolling motor (I will often go out for a long 3-4 hours day and like to be able to add some motor power). The motor is a Newport electric motor with 35 lb. thrust capability. I have used that motor at highest speeds for about 1 1/2 hours often pulling a tethered kayak and the battery has only dropped from 13.2 to 12. 2 volts. (they recommend to not go below 11 volts) However, it is heavy!! At first I had it placed behind me, but between my weight and adding battery weight to the back in addition to the weight of the motor, I only had about 1 inch leeway before the kayak would have gone under. I now place the battery in front of me and it fits perfectly between my legs as they are spread to the footholds in the kayak.
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Reviewed in the United States on April 20, 2020 by Gordon R. Thomas
Edition: Group 22NF NB
Bought this for a 4 person blow up raft. It worked great but is very heavy.
Reviewed in the United States on September 11, 2024 by Amazon Customer
Edition: Group 22NF NB
Excelente batería , la utilice en un bote inflable y motor electrónico. Nos dio 4 horas de diversión.
Reviewed in the United States on January 27, 2026 by Carlos Escalante
Edition: Group 22NF NB
Batteries just fine. Don’t take it right out of the box and use it or you’re gonna be disappointed. You have to put it on a trickle charge until it’s 100%. And I would definitely recommend their recommendation of not taking it below 25%. This is not off the cuff advice, I’m 58 and my daddy was a mechanic so I know the drill. JTP
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Reviewed in the United States on June 23, 2023 by JTP
Edition: Group 22NF NB
The battery came nearly fully charged (there was some discharge from being off charger, but nothing significant). It powered my 36lb thrust trolling motor roughly 4 hours at full power - pushing a 13' fully loaded fishing kayak with 15-20mph winds, and 4' - 5' waves. I wish my adult diapers worked as good as this power cube. The battery box says that there is still over half a charge left. That's pretty impressive for the price. I'd buy it again and suggest it to a friend.
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Reviewed in the United States on October 19, 2023 by Roger Branson
Edition: Group 22NF NB
I bought this battery as a 12 volt power supply for my CPAP. When fully charged I found that I can use it for at least four nights, 8 hours each night on a single 100% charge while boon-docking while out in my camper. To use with a CPAP be sure to get the proper 12 volt DC power supply cord recommended for you brand and model of CPAP. My CPAP cord came with a male cigarette plug attached and all I had to do is plug it into a female cigarette plug with alligator clips like this one https://www.amazon.com/BESTEK-Cigarette-Lighter-Battery-Extension/dp/B00JOY6U7U/ref=sr_1_5?dchild=1&keywords=12+volt+cigarette+female+with+glipes&qid=1598816232&sr=8-5 . Be sure to test it out at home before you leave to make sure it works properly. I also used it to charge cell phones and other digital equipment while boon docking.
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Reviewed in the United States on August 30, 2020 by Joe Blo
Edition: Group 22NF NB
This baby is chock full of power and only cost a hundred paltry American bucks, none of which made their way into the hands of the poor slaves in the third world where the minerals to manufacture it were mined....by children. Kids have sneakers to make, and minerals to mine, we use fossil fuels to do both, save the children.
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Reviewed in the United States on April 2, 2025 by Kawliga77