Best Group 31 Battery Agm for Marine, Truck, and RV Use

#1 · Best Overall

1. Interstate 31-AGM5

• Voltage: 12 V
• Compatible with Vehicle Type: Boat

Best for: Accessory-heavy marine setups.

Why it ranks #1: Its 100Ah capacity and 925 CCA pair starting output with stated deep-cycle marine power for motors and accessories.

Thick plates support this Interstate battery’s extreme deep-cycle discharge, enabling extended power for boat motors and accessories alongside high-cranking output. Its listed accessory examples include appliances, trolling motors, audio systems, depth finders, fish locators, and windlasses, making it especially relevant to boats with multiple onboard loads.

The 100Ah capacity and 925 CCA figures connect sustained accessory use with starting capability in a single 12V Group 31 AGM battery. Thick plates are specifically described as allowing continuous discharge, which suits a boat running equipment over time rather than only needing a brief start. At 60 pounds, it still requires attention when lifting into place, while its boat compatibility makes the marine application explicit in the listing.

Skip it if you need an RV-specific listing; Interstate Batteries Marine/RV 12V 100Ah 825CCA Group 31M explicitly names RV use.

This suits boat owners running several listed accessories while also needing motor-starting power. Consider its 60-pound handling weight and Group 31 fit when planning installation; the product listing specifically describes marine use, not RV compatibility.

Listed on Amazon as: Interstate Batteries Marine/RV Battery 12V 100Ah 925CCA 1110CA Group 31 AGM (31-AGM5)

#2 · Dual-Purpose Pick

2. Interstate 31M AGM

• Voltage: 12 V
• Compatible with Vehicle Type: Trailer
• Size: Group 31M

Best for: Dual-purpose boat and RV power.

Why it ranks #2: This Group 31M marine/RV AGM is explicitly designed for cranking and trolling-motor use, with 100Ah, 825 CCA, and a two-year warranty.

Its dual-purpose 12V AGM setup can crank a motor and power a trolling motor, including when the motor is off. That makes the Interstate 31M a practical fit for boaters or RV users who want starting and onboard power from one Group 31 battery.

The listing pairs 100Ah capacity with 825 CCA, giving buyers both a stated capacity for powering equipment and a cranking figure for engine starts. Its marine/RV positioning and dual-purpose description make it relevant when one battery must serve starting and trolling-motor duties. At 64.5 pounds, it is a substantial unit to handle during installation, so plan for the lifting involved when placing it in a boat or RV battery compartment.

Skip it if you need a listed capacity above 100Ah; the VMAX XTR31-135 specifies 135Ah for higher-capacity marine use.

Choose this Interstate for a boat or RV setup needing one AGM battery for engine starts and trolling-motor power. Its 100Ah rating and Group 31M size are relevant fit checks, and its 64.5-pound weight matters during installation.

Listed on Amazon as: Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Group 31M AGM

#3 · Strongest Cranking

3. Odyssey ODP-AGM31

• Voltage: 12 V
• Compatible with Vehicle Type: Truck
• Size: Small

Best for: Truck accessory power and starts.

Why it ranks #3: The listed 925 CCA and 1,750 PHCA suit starting demands, and its 200-minute reserve capacity and 92Ah rating add useful context.

A 925 CCA rating gives the Odyssey ODP-AGM31 substantial listed cranking output, while its 200-minute reserve capacity supports ongoing accessory use. The 12V Group 31 battery is described for trucks and increased onboard accessory use, offering a combination of starting and deep-cycle capability.

The 92Ah capacity pairs with 200 minutes of reserve capacity, helping truck buyers assess both battery capacity and stated reserve for accessories. Its 925 CCA and 1325 HCA figures provide additional starting-performance measures, while the right-side negative terminal location helps with cable-layout planning. Odyssey lists a Group 31 terminal configuration with stainless steel 3/8-inch posts, so buyers can check whether that arrangement suits their installation.

Skip it if you need 110Ah for marine loads; the Mighty Max MM-G31M lists 110Ah and dual-purpose boat use.

The ODP-AGM31 is suited to truck owners balancing engine starts with onboard accessory use. Its 92Ah capacity, right-side negative terminal, and stainless steel 3/8-inch posts are useful boundaries to check against the vehicle’s electrical demands and layout.

Listed on Amazon as: Odyssey Battery ODP-AGM31 Performance Series AGM Battery

#4 · Highest Capacity

4. Mighty Max MM-G31M

• Voltage: 12 V
• Compatible with Vehicle Type: Boat
• Size: Standard

Best for: Higher-capacity marine dual-purpose.

Why it ranks #4: Its 110Ah capacity, 825 CCA, and 240-minute reserve rating support buyers wanting marine starting and extended accessory power.

Its 110Ah capacity exceeds the 100Ah figure common in many listings here, enabling this Mighty Max to pair engine starting with longer-running onboard electronics and gear. The Group 31M AGM is also specified for dual-purpose starting and deep discharge, making it a marine-oriented choice for combined loads.

The 825 CCA and 1000 MCA ratings support its stated engine-starting role, while 110Ah capacity supplies the listed deep-cycle side of the combination. That pairing suits buyers who want one battery to start an engine and keep electronics or other gear running. The 13-by-6.81-by-9.37-inch dimensions help with compartment planning, but its 72.5-pound weight is a practical consideration when moving it into place.

Skip it if you need a lighter listed marine option; Interstate Batteries Marine/RV 12V 100Ah 925CCA 1110CA Group 31 AGM weighs 60 pounds.

Pick this Mighty Max for marine use when 110Ah capacity and combined starting and deep-cycle duties matter. Its dimensions and 72.5-pound weight deserve attention before installation, especially where access or lifting is difficult.

Listed on Amazon as: 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

#5 · Truck Application

5. Crown CRV31S

• Voltage: 12 V
• Compatible with Vehicle Type: Commercial Truck, Heavy-duty equipment…
• Size: 13.00 x 6.77 x 8.44 in

Best for: Commercial truck and equipment use.

Why it ranks #5: This Group 31 commercial AGM lists 100Ah and 950 CCA, making its stated truck and heavy-equipment focus clear.

With 950 CCA, the Crown CRV31S supplies a strong listed starting figure for commercial trucks and equipment. Its sealed, maintenance-free AGM construction is spill-proof, enabling buyers to consider it for heavy-duty applications where routine battery maintenance and secure installation are practical concerns.

The 100Ah capacity provides stated reserve power alongside the 950 CCA starting rating, covering both continued electrical demand and starting needs. Crown also lists vibration resistance and heavy-duty use, features relevant to commercial equipment operating in demanding conditions. Its 12V Group 31 format is specified for commercial trucks, heavy-duty equipment, and industrial applications. At 76 pounds, it requires planning for safe handling during installation or replacement.

Skip it if you need a marine battery with a higher stated capacity; the VMAX XTR31-135 lists 135Ah and boat compatibility.

Choose the Crown for commercial trucks, heavy-duty equipment, or industrial applications where 100Ah capacity and 950 CCA suit the job. Its Group 31 dimensions and 76-pound weight matter when planning placement and installation.

Listed on Amazon as: Crown Group 31 AGM Battery 12 Volt 100Ah 950 CCA Commercial Truck Battery – Sealed Maintenance Free | CRV31S (Pack of 1)

#6

6. Marxon Group 31M

• Compatible with Vehicle Type: marine rv
• Size: group 31M

Best for: Marine-RV dual-purpose replacement.

Why it ranks #6: The marine/RV dual-purpose battery lists 105Ah, 825 CCA, 200-minute reserve capacity, terminal orientation, and a two-year warranty.

The Marxon Group 31M combines 105Ah capacity with 825 CCA, enabling one battery to supply steady deep-cycle power and rapid engine-starting bursts. Its listing explicitly describes dual-purpose operation for marine and RV use, making it a relevant option for buyers combining starting and ongoing electrical loads.

The 200-minute reserve capacity adds a stated measure of sustained power alongside the 105Ah capacity, while 825 CCA covers the starting side of its dual-purpose role. Its dimensions are 12.99 by 6.61 by 8.35 inches, and the listing specifies positive terminal on the left and negative on the right. Those details help buyers plan compartment placement and cable routing before installation; the included screws and nuts are also identified.

Skip it if you need higher stated capacity; the VMAX XTR31-135 lists 135Ah for power-intensive marine loads.

This Marxon suits marine or RV buyers wanting one Group 31M battery for cranking and continuous loads. Check its 12.99-by-6.61-by-8.35-inch dimensions and specified terminal orientation against the compartment and cable layout.

Listed on Amazon as: Group 31M Marine Battery Dual Purpose Marxon 12V 105Ah 1072MCA 825CCA

#7

7. Odyssey ODX-AGM31

• Voltage: 12 V
• Compatible with Vehicle Type: Passenger Car

Best for: High-cranking AGM applications.

Why it ranks #7: Its description lists 1,150 CCA and the product claims longer cycle life than conventional deep-cycle batteries, though capacity data is absent.

The Odyssey ODX-AGM31 is listed with 1,150 cold cranking amps, giving it a clearly stated starting-power focus. Its 12V AGM format and high stable voltage for longer periods also make it relevant to buyers prioritizing sustained voltage behavior alongside strong cranking capability.

Odyssey states 70% longer cycle life than conventional deep-cycle batteries, which may matter to buyers weighing repeated cycling as well as starting. The additional description lists 1,150 CCA and threaded top terminals, giving buyers a concrete cranking figure and terminal style to consider during installation planning. Its listed dimensions are 9.25 by 15.25 by 12.5 inches, so compare those measurements with the available battery space before purchase.

Skip it if you need a listed marine dual-purpose battery; Interstate Batteries Marine/RV 12V 100Ah 825CCA Group 31M names marine and RV use.

This Odyssey fits buyers focused on high cranking output and the stated cycle-life advantage over conventional deep-cycle batteries. Its passenger-car compatibility and listed dimensions are important boundaries to weigh for marine or constrained installations.

Listed on Amazon as: Odyssey Battery ODX-AGM31 Extreme Series AGM Battery

#8

8. VMAX XTR31-135

• Voltage: 12 V
• Compatible with Vehicle Type: Boat
• Size: 1 Count (Pack of 1)

Best for: High-demand trolling motor power.

Why it ranks #8: The marine listing states 135Ah and 265-minute reserve capacity, but its title and feature text conflict on cranking output.

A 135Ah capacity and 265-minute reserve make the VMAX XTR31-135 a high-capacity choice for power-hungry marine loads, including high-thrust trolling motors and fish finders. It also lists 1,150 CCA and 1,500 MCA, so its deep-cycle capacity is paired with substantial engine-starting figures.

The 135Ah capacity and 265-minute reserve support extended marine power needs, while the 1,150 CCA and 1,500 MCA figures address high-surge starting demands for large outboard engines. The product is specified for boat use and described as a sealed deep-cycle AGM battery. At 78 pounds, it is a heavy unit to position, so account for handling when planning installation in a boat’s battery compartment.

Skip it if you need a lighter 100Ah marine battery; Interstate Batteries Marine/RV 12V 100Ah 925CCA 1110CA Group 31 AGM weighs 60 pounds.

This VMAX suits boaters with high-thrust trolling motors, fish finders, or large outboards who need both extended reserve and strong starting figures. Its 78-pound weight and listed dimensions need careful installation planning.

Listed on Amazon as: VMAX XTR31-135 12V 135AH Vmaxtanks AGM Sealed Deep Cycle 12V 135AH 800CCA Deep Cycle Group 31 Battery

#9

9. ACDelco Gold 31XAGMA

Best for: GM replacement and broad vehicle fit.

Why it ranks #9: The title identifies a heavy-duty Group 31 AGM, but the supplied specifications omit capacity and cranking figures needed for closer comparison.

ACDelco Gold states that this Group 31 AGM meets fit, form, and function specifications for General Motors vehicles as well as most makes and models. That makes it relevant to buyers seeking an OE-alternative replacement with broad stated vehicle coverage rather than a battery marketed specifically for marine use.

The listing identifies the 31XAGMA as a premium heavy-duty AGM Group 31 battery and says ACDelco Gold parts are high-quality OE alternatives for GM vehicles and more. That positioning helps buyers considering a replacement across GM and other makes, while the stated fit, form, and function specifications offer a defined compatibility basis. At 77.8 pounds, it is a substantial battery to handle during removal and installation.

Skip it if you need explicit boat compatibility and a listed 100Ah capacity; the Crown CRV31S specifies both for commercial use.

Consider the ACDelco Gold for buyers seeking a heavy-duty Group 31 AGM replacement for a GM vehicle or many other makes and models. Its 77.8-pound weight matters during service, and the listing does not position it specifically for marine use.

Listed on Amazon as: ACDelco Gold 31XAGMA (88866074) 48 Month Warranty Premium Heavy Duty AGM BCI Group 31 Battery

#10

10. Mighty Max MM-G31

• Voltage: 12 V
• Compatible with Vehicle Type: Passenger Car
• Size: Group 31

Best for: Passenger-car starting and reserve.

Why it ranks #10: This 100Ah, 900 CCA Group 31 AGM is described for passenger cars rather than marine, RV, or commercial applications.

A 900 CCA rating gives the Mighty Max MM-G31 strong starting output, while its 140-minute reserve capacity supports longer run times. Those figures make this 12V Group 31 AGM a candidate for passenger-car buyers who want starting power with stated reserve capability in a sealed, spill-proof format.

The 100Ah capacity works alongside the 140-minute reserve rating to provide a clearer picture of both stored capacity and reserve operation. Its 900 CCA figure supports the stated fast-starting role, while the sealed, spill-proof AGM design avoids the mess associated with spills during use. Dimensions of 12.88 by 6.75 by 9.5 inches give buyers concrete measurements to compare with their battery space before installation.

Skip it if you need a stated dual-purpose marine battery; the Mighty Max MM-G31M lists boat compatibility and starting plus deep-discharge use.

Consider the MM-G31 for a passenger-car setup where its 900 CCA, 100Ah capacity, and reserve rating suit the intended workload. Check the listed 12.88-by-6.75-by-9.5-inch dimensions against the available battery space.

Listed on Amazon as: Mighty Max Battery MM-G31 Start and Stop Car BCI Group 31 12V 100AH, 140RC, 900 CCA, Rechargeable AGM Car battery