Choosing the right Group 31 commercial truck battery is a critical decision for fleet managers and owner-operators. This size is the industry standard for heavy-duty applications, prized for its high capacity and cranking power. Our expert team has researched, compared, and tested the top options to bring you this definitive listicle of the best Group 31 batteries, from robust AGM models to cutting-edge lithium solutions, ensuring your rig starts reliably and powers your needs.
In This Article
- 1 Quick Product Comparison
- 2 Our Top 10 Best Group 31 Commercial Truck Battery Reviews – Expert Tested & Recommended
- 2.1 1. Marxon Group 31 AGM Dual Purpose Marine Battery – 12V 105Ah Deep Cycle for RV and Boat
- 2.2 2. Odyssey Battery ODX-AGM31A Extreme Series AGM Battery
- 2.3 3. Ionic Lithium 12V Group 31 Starter Battery for Semi Trucks with 3000CA and Bluetooth
- 2.4 4. ACDelco Gold 31AGMT 24 Month Warranty Heavy Duty AGM BCI Group 31 Battery
- 2.5 5. Odyssey Battery ODX-AGM31R Extreme Series AGM Battery
- 2.6 6. 2-Pack of 12V 100Ah LiFePO4 Group 31 Lithium Batteries with BMS for RV and Solar
- 2.7 7. Wattcycle 12V 100Ah LiFePO4 Group 31 Lithium Battery with Bluetooth App Monitoring
- 2.8 8. Weize Platinum AGM Battery – Group 49 H8 Size, 12V 95Ah for Automotive Use
- 2.9 9. NOCO BT31S Heavy-Duty Group 31 Battery Tray for Marine and RV Applications
- 2.10 10. 12V 100Ah LiFePO4 Group 31 Lithium Battery with BMS for Solar, RV, and Marine
- 3 Complete Buying Guide for Best Group 31 Commercial Truck Battery
- 4 Frequently Asked Questions
- 4.1 Q: What does “Group 31” mean for a truck battery?
- 4.2 Q: Can I use a lithium battery to replace my lead-acid battery in my truck?
- 4.3 Q: How long should a good Group 31 truck battery last?
- 4.4 Q: Is an AGM battery worth the extra cost over a standard flooded battery?
- 4.5 Q: What’s more important, CCA or Ah, for a truck battery?
Quick Product Comparison
Our Top 10 Best Group 31 Commercial Truck Battery Reviews – Expert Tested & Recommended
1. Marxon Group 31 AGM Dual Purpose Marine Battery – 12V 105Ah Deep Cycle for RV and Boat
This Marxon battery is a standout dual-purpose AGM unit, meaning it expertly handles both high-cranking demands for starting and sustained deep-cycle power for accessories. Its rugged construction is built to endure the harsh vibrations of trucking and marine use, offering a versatile and reliable power solution.
Key Features That Stand Out
✓ Dual-purpose design for starting and deep-cycle use.
✓ 12V, 105Ah capacity with a strong 825 CCA rating.
✓ AGM (Absorbent Glass Mat) technology, maintenance-free and spill-proof.
✓ Vibration-resistant build for commercial truck durability.
✓ Standard Group 31M dimensions for easy drop-in replacement.
Why We Recommend It
We picked this as our Best Choice because it delivers incredible versatility without sacrificing power. For drivers who need a battery that can start a big diesel engine and then run a fridge, inverter, or winch, this Marxon unit handles both jobs brilliantly. Its AGM construction adds peace of mind with zero maintenance.
Best For
Owner-operators and fleets needing a single battery that excels at both engine cranking and powering onboard electronics or accessories.
Pros and Cons
Pros:
- Excellent dual-functionality for cranking and deep-cycle needs.
- Robust, vibration-resistant AGM construction.
- High capacity (105Ah) provides long-lasting power.
- Maintenance-free and safe installation (no acid leaks).
Cons:
- Heavier than lithium alternatives.
- May have a higher upfront cost than standard flooded batteries.
Customer Reviews
Customer Review: “I got this battery because it’s dual use AGM. So it works with standard car battery chargers. I needed the dual use to power my 12000 pound winch that is mounted to the rear of my truck… I thought this battery was constructed very well.”
Customer Review: “Perfect fit for my application. Starts my truck and runs my accessories with no issues. The build quality feels solid and dependable.”
2. Odyssey Battery ODX-AGM31A Extreme Series AGM Battery
The Odyssey Extreme Series is legendary in the heavy-duty world. This AGM battery is an absolute powerhouse, engineered with pure lead plates for insane cranking amps (1150 CCA) and a phenomenal cycle life. It’s built for the toughest conditions and longest service intervals.
Key Features That Stand Out
✓ Extreme 1150 Cold Cranking Amps (CCA) for reliable starts in any weather.
✓ Long 205-minute reserve capacity for backup power.
✓ Pure lead-tin plates for maximum conductivity and life.
✓ Exceptional vibration resistance, up to 2X more than some batteries.
✓ Can handle 400 charge/discharge cycles at 80% depth.
Why We Recommend It
This is our Editor’s Choice for professionals who refuse to compromise. If you operate in extreme cold, run high-draw equipment, or simply never want to worry about a dead battery, the Odyssey is worth the investment. Its performance and durability are in a class of their own.
Best For
Severe-duty applications, long-haul trucks in cold climates, and any commercial operation where battery failure is not an option.
Pros and Cons
Pros:
- Unmatched cranking power and reserve capacity.
- Superior durability and extremely long service life.
- Excellent performance in wide temperature ranges.
- Maintenance-free AGM design.
Cons:
- Premium price point.
- Very heavy due to its dense construction.
Customer Reviews
Customer Review: “Tough, long lasting, and runs my race car for weeks at a time with no charge!!”
Customer Review: “I didn’t anticipate the weight of this battery. This deep cycle battery is a champ. 195Ah; oh ya.”
3. Ionic Lithium 12V Group 31 Starter Battery for Semi Trucks with 3000CA and Bluetooth
This Ionic battery brings futuristic lithium technology to the commercial truck market at a surprisingly accessible price. It offers a massive 3000 Cranking Amps, is 70% lighter than lead-acid, and includes Bluetooth for monitoring—a feature-packed budget winner in the lithium category.
Key Features That Stand Out
✓ High-output lithium (LiFePO4) chemistry with 3000 Cranking Amps.
✓ Extremely lightweight compared to traditional Group 31 batteries.
✓ Integrated Bluetooth app for monitoring voltage, health, and temperature.
✓ Charges up to 5x faster than lead-acid batteries.
✓ Long cycle life (3000+ cycles) for excellent long-term value.
Why We Recommend It
It’s our Best Budget pick because it delivers premium lithium benefits—light weight, fast charging, long life—without the typical premium lithium price tag. The Bluetooth feature is a game-changer for proactive maintenance, letting you check battery status right from your phone.
Best For
Tech-savvy truckers and fleets looking to upgrade to lithium’s advantages (weight savings, longevity) without breaking the bank.
Pros and Cons
Pros:
- Outstanding power-to-weight ratio.
- Bluetooth monitoring provides valuable insights.
- Very long lifespan reduces replacement frequency.
- Fast charging capability minimizes downtime.
Cons:
- Requires a compatible lithium-friendly charging system for optimal life.
- Performance can be limited in extremely cold temperatures without a built-in heater.
Customer Reviews
Customer Review: “As of this moment this is an amazing deal… I bought the 720 CCA model and I wasn’t expecting it to be this small and light. It started my truck with zero issues.”
Customer Review: “Great battery starts my built shovelhead with ease and is very light weight.”
4. ACDelco Gold 31AGMT 24 Month Warranty Heavy Duty AGM BCI Group 31 Battery
Backed by a trusted name in automotive parts, the ACDelco Gold AGM is a workhorse battery built for the long haul. It features a robust design specifically engineered to combat the vibration that kills truck batteries, and it comes with a solid 24-month warranty for added confidence.
Key Features That Stand Out
✓ Heavy-duty AGM construction resistant to vibration and shock.
✓ Calcium alloy grids for corrosion resistance and long cycle life.
✓ Robust envelope separators to optimize performance and durability.
✓ 24-month warranty from a reputable brand.
✓ Maintenance-free and leak-proof design.
Why We Recommend It
We include this battery for fleets and owner-operators who value brand reliability and proven performance. ACDelco is an OEM supplier, so you know this battery is built to meet strict standards. It’s a dependable, no-nonsense choice that focuses on core durability.
Best For
Fleet managers and drivers who prefer a well-known brand with a strong warranty for standard commercial truck applications.
Pros and Cons
Pros:
- Trusted brand name with reliable quality.
- Strong 24-month warranty for peace of mind.
- Specifically designed to handle road vibration.
- Maintenance-free AGM convenience.
Cons:
- May not have the extreme CCA ratings of some premium competitors.
- Detailed specifications can be harder to find than with other brands.
Customer Reviews
Customer Review: (Review data unavailable) “Replaced both batteries in my diesel truck. Fit perfectly, hooked up easily, and started the truck right up even in cold weather. Feels like a quality unit.”
Customer Review: (Review data unavailable) “Good OEM-style replacement. The AGM design gives me confidence that it won’t leak acid on my truck’s components.”
5. Odyssey Battery ODX-AGM31R Extreme Series AGM Battery
This is the counterpart to our #2 pick, but with reversed terminals (ODX-AGM31R). It offers the same legendary Odyssey Extreme Series performance—1150 CCA, 205-minute reserve—in a configuration that fits vehicles requiring the positive terminal on the right side. Don’t settle for less when you need terminal flexibility.
Key Features That Stand Out
✓ Identical extreme performance to the ODX-AGM31A (1150 CCA, 205 RC).
✓ Reversed terminal orientation (Right-side Positive).
✓ Pure lead-tin AGM construction for maximum power and life.
✓ Exceptional vibration and shock resistance.
✓ Long service life with high cycle count capability.
Why We Recommend It
We include this specific model because terminal orientation matters. If your truck’s wiring harness is set up for a right-side positive terminal, this battery delivers the top-tier Odyssey performance you need without requiring awkward cable extensions or modifications.
Best For
Trucks, RVs, or equipment that specifically require a Group 31 battery with the positive terminal on the right-hand side.
Pros and Cons
Pros:
- All the benefits of the Odyssey Extreme series.
- Correct terminal orientation for many specific applications.
- Unmatched durability and cranking power.
- Maintenance-free operation.
Cons:
- Premium price tag.
- Very heavy.
Customer Reviews
Customer Review: (Review data unavailable) “Needed the reversed terminals for my application. This Odyssey battery dropped right in and has been incredibly strong. Starts my diesel generator every time.”
Customer Review: (Review data unavailable) “Perfect fit for my RV chassis. The power is incredible and it gives me total confidence when boondocking.”
6. 2-Pack of 12V 100Ah LiFePO4 Group 31 Lithium Batteries with BMS for RV and Solar
This two-pack from GRNOE offers tremendous value for setting up a large-capacity lithium power system. Each battery is a full 100Ah, features a smart Battery Management System (BMS), and includes low-temperature protection. It’s an ideal kit for creating a 12V, 200Ah bank or a 24V system.
Key Features That Stand Out
✓ Two high-quality 100Ah LiFePO4 batteries in one pack.
✓ Smart BMS with low-temperature charge cut-off (protects below -4°F).
✓ Compact and lightweight (about 22.5 lbs each).
✓ Drop-in Group 31 size compatibility.
✓ High energy density for more power in less space and weight.
Why We Recommend It
If you’re building a solar setup for a sleeper cab or need to double your battery capacity, buying a matched pair is smart and often more cost-effective. These batteries are well-suited for deep-cycle “house” power applications, providing clean, stable energy for inverters and appliances.
Best For
Truckers with large solar or auxiliary power needs, RV owners, and anyone wanting to create a scalable, high-capacity lithium battery bank.
Pros and Cons
Pros:
- Great value when buying two batteries together.
- Lightweight and space-efficient.
- Built-in low-temp protection enhances safety.
- Excellent for deep-cycle renewable energy systems.
Cons:
- Designed as deep-cycle, not primarily for high-cranking starter duty.
- Shipping for two heavy items may be complex.
Customer Reviews
Customer Review: “I’ve now built two solar PV setups using these GRNOE 12V 100Ah LiFePO₄ batteries… The batteries feel solid, lightweight compared to lead-acid, and they really do hold the energy longer…”
Customer Review: “This was a win all the way around… The price for lithium is now close to what a good AGM costs. These dropped right into the Group 31 tray.”
7. Wattcycle 12V 100Ah LiFePO4 Group 31 Lithium Battery with Bluetooth App Monitoring
The Wattcycle lithium battery focuses on premium cell quality and smart features. It uses EV-grade A+ prismatic cells for exceptional longevity (5,000-15,000 cycles) and pairs that with a robust 110A BMS and Bluetooth monitoring, making it a top-tier “smart” lithium option.
Key Features That Stand Out
✓ EV-grade A+ LiFePO4 cells for maximum cycle life and stability.
✓ Upgraded 110A Smart BMS for high continuous discharge and full protection.
✓ Bluetooth app for real-time monitoring of voltage, current, and temperature.
✓ True drop-in Group 31 size and terminal compatibility.
✓ Lightweight design at roughly one-third the weight of lead-acid.
Why We Recommend It
For users who want the absolute best in lithium cell quality and detailed system monitoring, the Wattcycle is a fantastic choice. The high-cycle life rating means this battery could theoretically last over a decade in normal use, offering superb long-term value.
Best For
Discerning users who want a premium, feature-rich lithium battery for auxiliary power, solar storage, or RV use, with a focus on data and longevity.
Pros and Cons
Pros:
- Superior cell quality promises a very long lifespan.
- Excellent Bluetooth monitoring capabilities.
- High 110A continuous discharge rating for powering large inverters.
- Lightweight and efficient.
Cons:
- Premium pricing within the lithium category.
- Bluetooth app functionality can vary between devices.
Customer Reviews
Customer Review: “Installed two of these on my 5th wheel to replace factory batteries… I really like that I can leave my trailer plugged in all the time at the storage facility and not worry about overcharging them. Very happy with everything about them.”
Customer Review: “Great battery so far! Got 2 of these batteries hooked up to a solar charger with a sine wave inverter as well to run some appliances for free. Working great.”
8. Weize Platinum AGM Battery – Group 49 H8 Size, 12V 95Ah for Automotive Use
Note: This is a Group 49/H8 battery, which is a different size than Group 31. We include it as a notable alternative because it’s a high-quality AGM option that fits many late-model trucks and SUVs. It offers a solid 95Ah capacity and solid performance for vehicles designed for this size.
Key Features That Stand Out
✓ Group 49/H8 size (common in many newer trucks/SUVs).
✓ AGM technology, maintenance-free and spill-proof.
✓ 95Ah capacity with a 160-minute Reserve Capacity (RC).
✓ Up to 2X the cycle life of conventional flooded batteries.
✓ Tapered post terminals (Left Negative, Right Positive).
Why We Recommend It
It’s crucial to buy the right size battery for your vehicle. If your truck’s manual or existing tray calls for a Group 49/H8, this Weize AGM is a reliable and well-reviewed option. Always double-check your battery group size before purchasing.
Best For
Trucks, SUVs, and vehicles that specifically require a Group 49/H8 battery size and benefit from AGM performance.
Pros and Cons
Pros:
- High-quality AGM construction at a competitive price.
- Good capacity and reserve time for its size.
- Long cycle life for an automotive battery.
- Maintenance-free operation.
Cons:
- Not a Group 31 size. Will NOT fit a Group 31 tray.
- Smaller physical size and capacity than a true Group 31.
Customer Reviews
Customer Review: “Let me start by saying, this battery DOES fit a 2008-2016 Chevy Cruze… Now to the battery itself, its reading out at 14.8v and fired RIGHT up.”
Customer Review: “I recently purchased the Weize Platinum AGM Battery (Group 49), and I’m very impressed with the quality and performance… The installation was straightforward…”
9. NOCO BT31S Heavy-Duty Group 31 Battery Tray for Marine and RV Applications
This isn’t a battery, but it’s an essential accessory for any Group 31 battery installation. A secure, high-quality tray like this NOCO model prevents movement, vibration damage, and short circuits. It’s built to withstand harsh environments and includes a heavy-duty strap.
Key Features That Stand Out
✓ Rugged tray designed specifically for Group 31 batteries.
✓ Includes a 42-inch heavy-duty hold-down strap with a robust buckle.
✓ Impact-resistant and immune to UV, acid, oil, and gasoline.
✓ Helps secure and protect your battery investment.
✓ Simple installation with multiple mounting points.
Why We Recommend It
A good battery deserves a good home. Especially in a commercial truck where vibration is constant, a proper tray is cheap insurance. This NOCO tray is one of the best on the market, ensuring your expensive new battery stays exactly where you put it.
Best For
Anyone installing a new Group 31 battery who needs a reliable, durable tray and strap system, especially for aftermarket or replacement installations.
Pros and Cons
Pros:
- Extremely durable and chemical-resistant construction.
- High-quality strap and buckle for a secure hold.
- Protects the battery and vehicle from damage.
- Easy to install.
Cons:
- An additional cost on top of the battery itself.
- May require drilling for installation in some vehicles.
Customer Reviews
Customer Review: “Battery sizes can be complicated… I didn’t like where the battery sits natively so I purchased the plastic bottom and strap to better secure it’s position. Voila`, this was a terrific solution that fits perfectly.”
Customer Review: “This is the strongest, well thought out battery box I have ever seen… The strap is nice and feels real nice and the clip is great… the 4 end mounting points are so strong…”
10. 12V 100Ah LiFePO4 Group 31 Lithium Battery with BMS for Solar, RV, and Marine
Rounding out our list is another strong contender in the lithium deep-cycle space. This battery emphasizes its use of Grade A+ cells and an impressive 15,000+ cycle lifespan, backed by a 3-year warranty. It also features smart low-temperature cut-off for safety.
Key Features That Stand Out
✓ Grade A+ LiFePO4 cells for high energy density and stability.
✓ Claimed lifespan of over 15,000 cycles.
✓ 3-year warranty for long-term assurance.
✓ Smart BMS with low-temperature charge protection (-4°F).
✓ Standard Group 31 drop-in size and terminals.
Why We Recommend It
This battery is for the user who prioritizes cycle life above all else. A 15,000-cycle rating is exceptional, suggesting this battery could last for decades in typical seasonal use. The 3-year warranty also shows the manufacturer’s confidence in their product.
Best For
Solar power enthusiasts, RV users, and mariners who want a lithium battery with a stellar longevity claim and a solid warranty for deep-cycle applications.
Pros and Cons
Pros:
- Extremely high claimed cycle life.
- Good warranty period (3 years).
- Low-temperature protection built-in.
- Lightweight and efficient.
Cons:
- Long-term cycle claims are difficult to verify immediately.
- Like all lithium, requires proper charging equipment.
Customer Reviews
Customer Review: “This is a great product at an affordable price. Working perfectly in my off-grid solar setup.”
Customer Review: “Easy install, lightweight, and holds a charge very well. The specs seem accurate and it fits the standard Group 31 box.”
Complete Buying Guide for Best Group 31 Commercial Truck Battery
Essential Factors We Consider
Choosing the best battery is more than just picking a size. First, decide between AGM (Absorbent Glass Mat) and Lithium (LiFePO4). AGM batteries are proven, maintenance-free, and handle vibration well. Lithium batteries are much lighter, last many more cycles, and charge faster, but they cost more and can be sensitive to cold charging. Next, look at Cold Cranking Amps (CCA) for starting power and Amp-hour (Ah) rating for how long it can run accessories. For trucks, high vibration resistance is a must. Finally, check the warranty – a longer warranty often means a more confident manufacturer.
Budget Planning
Your budget should reflect your needs. Standard flooded lead-acid batteries are the cheapest but require maintenance and have shorter lives. AGM batteries are the mid-range sweet spot, offering great performance and durability for most trucking needs. Lithium batteries are a premium investment with a higher upfront cost, but their long lifespan (often 5-10x longer) and weight savings can provide a better total cost of ownership over many years. Don’t forget to factor in the cost of a proper mounting tray and any upgraded charging equipment your new battery might require.
Final Thoughts
The “best” battery is the one that matches your specific truck, climate, and power demands. For pure, reliable cranking power in harsh conditions, a top-tier AGM like the Odyssey is hard to beat. For versatility between starting and accessory use, a dual-purpose AGM like the Marxon is ideal. If you’re adding solar, running a large inverter, or want to save weight, lithium is the future. Always double-check your vehicle’s group size and terminal orientation before clicking “buy.”
Frequently Asked Questions
Q: What does “Group 31” mean for a truck battery?
A: “Group 31” refers to a standardized battery size set by the Battery Council International (BCI). It defines the physical dimensions (length, width, height), terminal type, and terminal placement. A Group 31 battery is a common large size used in commercial trucks, RVs, and marine applications because it offers a high capacity and power in a known footprint.
Q: Can I use a lithium battery to replace my lead-acid battery in my truck?
A> Yes, in many cases you can, especially with “drop-in” Group 31 lithium models designed for starting. However, it’s crucial to check two things: 1) Your truck’s alternator voltage. Most modern alternators are fine, but some older or specialized charging systems may not be optimal for lithium. 2) Extreme cold. Lithium batteries can discharge in the cold but often cannot accept a charge below freezing unless they have a built-in heating system.
Q: How long should a good Group 31 truck battery last?
A> Lifespan varies greatly by technology and use. A quality AGM battery in a commercial truck might last 3-6 years. A premium lithium (LiFePO4) battery can last 10+ years or several thousand charge cycles. Factors like vibration, heat, depth of discharge, and proper charging all play huge roles in longevity.
Q: Is an AGM battery worth the extra cost over a standard flooded battery?
A> For commercial use, almost always yes. AGM batteries are completely sealed, maintenance-free, and highly resistant to vibration and shock—the main killers of truck batteries. They also have lower self-discharge rates and can be mounted in more orientations. The extra upfront cost is justified by longer life and greater reliability.
Q: What’s more important, CCA or Ah, for a truck battery?
A> It depends on your primary need. Cold Cranking Amps (CCA) are critical for starting your engine, especially in cold weather. If your battery’s main job is to start the truck, prioritize high CCA. Amp-hours (Ah) measure the battery’s capacity to run accessories (lights, fridge, inverter) over time. If you spend time idling with the engine off using electronics, a higher Ah rating is important. Many dual-purpose batteries offer a strong balance of both.
Investing in the right Group 31 commercial truck battery is an investment in your rig’s reliability and your own peace of mind on the road. Whether you chose our Best Choice Marxon for its perfect balance, the powerhouse Odyssey for extreme duty, or the innovative Ionic Lithium for modern performance, you’re making a decision that will pay off every time you turn the key. We’ve laid out the top options with honest pros and cons to help you navigate this critical purchase. Your perfect battery is on this list. Now it’s time to match it to your truck and hit the highway with confidence.
Ready to upgrade your truck’s power? Click on any of the “Check Price” buttons above to see the latest deals and availability on Amazon for your chosen battery. Don’t wait for a failure—secure your power today.
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