Updated at: 31-03-2022 - By: micdot

In order to get the best performance out of their vehicle, every car owner knows how to purchase a great replacement car battery. Because of this, you will not be forced to deal with any issues that might emerge from utilizing a battery that is not the greatest match.

So as an owner of a vehicle, you need to know the appropriate group size for your vehicle. The Battery Council International specifies a number of battery groups for automobiles, one of which being group 31. Group 31 car batteries are a unique sort of battery that only operate well when utilized in the right vehicle. Our in-depth look at the best group 31 batteries can be found right here.

What Are Group 31 Batteries?

In terms of deep cycling capacity and other unmatched capabilities, group 31 batteries are among the most powerful group sizes. The group 31 batteries, according to the Battery Council International, measure 13X6.8X9.44 inches (inches). The seamless features and unsurpassed performance of this battery size group make it a popular choice for automobiles. Their precise design and intended use determines which type of group 31 battery is best for a certain application.

Deep discharging and long cycles are possible because of the large group size of automobile batteries. They can be found in a variety of vehicles, including automobiles, boats, and even off-road vehicles. Group 31 batteries are the only ones that will function in your device, so be sure you know which one you need before you start shopping. To learn more about the best vehicle battery, check out this post.

Are All Group 31 Batteries The Same Size?

Group 31 automobile batteries, which are heavy-duty commercial-grade batteries, may be assumed to be the same size across the board. No meaningful difference can be found between one and two. In the case of group 31 vehicle batteries, you should also note that the group size does not define the individual group size’s power potential (they are highly powerful).

What Is The Difference Between Group 24 And Group 31 Batteries?

There is a little variation between the group 24 and group 31 automobile batteries, even though both are rated the finest for extensive cycling. Group 31 automobile batteries have a higher amp hour capacity than group 24 batteries. Due to the greater amp-hour capacity of a large-capacity battery, a larger battery produces more amp-hours than a smaller-capacity battery (10.25 x 6.8125 x 8.875inches).

What is the Difference Between a Group 24 and Group 34 Battery? | OPTIMA  Batteries

Top 5 Best Group 31 Batteries Reviews

1. Optima D31M BlueTop Starting And Deep Cycle Battery

One of the most useful qualities of this battery is its ability to do deep cycles, making it a great choice for those who want a starting and deep cycle battery in one package. As soon as you attach it to your vehicle, you’ll notice that it provides consistently smooth starts. This group 31 battery’s reserve capacity helps to ensure a lengthy shelf life.

The benefit of this is that you’ll have a car battery that will last for a long period without suffering any problems. Recharging this battery is as quick as possible, and you can get back to using it as soon as possible, much like the top car battery options. Consistent power delivery ensures that you can keep your car moving for as long as necessary. When it comes to Optima goods, you know you’re getting high-quality, well-tested technology.

The SpiralCell design, for example, protects the battery from spillage and enhances its tolerance. In terms of your vehicle’s performance, the low self-discharge rate of this car battery is a strong selling point. When you don’t use the battery for a long period, this feature keeps it in peak condition, allowing you to keep using it without worrying about draining it.


In order to avoid acid spills,

Despite this, the self-discharge rate is rather low.

Recharging takes only a few minutes.

It does not need to be serviced.

Increased capacity at 990A and a backup of 75Ah


Quite a pricey investment

2. 31 Series Marine Battery Replaces Blue Top D31M

The Series Marine Battery Replaces Blue Top D31M is equipped with cutting-edge technology that ensures you’ll have an experience you’ll never forget. To give one example, they provide unequaled performance in any situation. They stand out from the competition because of their affordable prices and their capacity to handle heavy deep charges.

When purchasing this battery, you get a 2-year warranty with every purchase. After installing it in your vehicle, you’ll have the confidence you need. When it comes to powering modern automobiles, this is the battery to turn to. In today’s automobiles, you’ll find plenty of high-tech features, such as high-powered stereos, lighting, and other comforts like air conditioning. This is a feat that not all automobile batteries can accomplish with ease, and it’s done while maintaining peak engine performance.


The product is reasonably priced.

Outstanding ability to call on a backup source

Even after a long period of inactivity, it maintains its charge.

Doesn’t need any kind of upkeep


The CCA rating doesn’t measure up to the best-known names in the industry.

3. VMAX MR137-120 AGM Sealed Marine AGM Battery

QTY3 VMAX MR137-120 12V 120AH AGM Deep Cycle Group 31 Batteries for 36 Volt  36v 105 Pound 105lb Thrust Trolling Motors - Walmart.com

If you’re looking for a long-lasting battery, the VMAX MR137-120 AGM Sealed Marine AGM Battery may be the answer. You won’t have to buy a new battery for at least ten years with this one. In the case of this battery, you will save money because the buying price is relatively low. In return, you’ll receive a high-quality automobile battery on which you may rely for extended periods of time. The battery’s performance is also comparable to the finest brands on this list.

Rather than using lead alloy plates for the battery, lead-tin alloy plates are used since they are more durable. It’s preferable to use the plates in floating or cyclic discharges. They can also help the vehicle’s performance by reducing friction over time. A special electrolyte suspension technique is employed to ensure the battery’s safety. Using a high-porosity absorbent glass mat, this technology ensures that the battery is always operating at its peak efficiency. A leaky part or corroded metal part will not be able to harm the battery if you use this technique. Consistent performance may be expected when this battery is attached to the car. Resilience has been built into the design, so there will be no decrease in power output.

This is a battery that is not affected by the minor difficulties that other brands of A.G.M. batteries encounter. This device prevents spills and extends the battery’s usefulness for a large period of time. In addition, this is a maintenance-free battery, so you won’t have to worry about checking the water level or the electrolyte.


a longer life span

There is a significant self-discharge.

The density of its power is increased.


dependable even in the most severe climates


There is a short warranty period.

4. Odyssey 31-PC21505 Heavy Duty Commercial Battery

The Odyssey 31-PC21505 Heavy Duty Commercial Battery is a fantastic option if you need a group 31 battery that can also start quickly. Compared to most of the other products on this list, this one has the best initial power. A vehicle with high-tech electronics and an engine that requires plenty of power would also find it suitable for use with this charger. This battery’s architecture performs a great job of ensuring that it does not lose any power when it is in use. For starters, the bigger surface area of the pure lead plates assures more power production, as well as optimal performance for the duration of the vehicle’s journey.

This automobile battery’s reserve capacity is 205 minutes, and its Cold Crank Amp is 1150 A. You’ll be pleased with what this battery can do for you. As a result, the battery will be able to deliver optimal performance regardless of the outside temperature. With a new battery, you’ll be able to get off to a flawless start. This is a car battery you can trust, since it comes with a 4-year full replacement warranty in addition to a 3-year limited warranty. When it comes to warranties, some of the options on this list may not even be this close. In addition, the group 31 battery is guaranteed to endure for at least five years on average.


Reserve capacity and enhanced CCA

Up to a decade of use is possible.

You’ll be happy to know about this warranty.

When it comes to installation, it is the simplest.

Has a longer lifecycle than its competitors.


Quite a pricey investment

5. Deka East Penn 8A31DTM Group 31 AGM HD Battery12V 800CCA

Deka 9A34 AGM Intimidator Battery- Buy Online in Saint Vincent and the  Grenadines at Desertcart - 135597030.

The Deka East Penn 8A31DTM Group 31 AGM HD Battery12V may be the answer for marine vehicles’ power requirements. The architecture of this battery ensures that it will always be able to deliver a high level of power. This brand of group 31 automobile battery is known for providing outstanding starts and long-lasting service. This while keeping the performance at its highest level. When the power output drops, you won’t have to deal with the same gray areas that you would with other models. This is true even if your car’s electronic systems are activated. This battery’s A.G.M. technology is sufficient to ensure the brand’s long-term viability. You will get a product that is simple to operate with when you purchase this product that is totally sealed.

The electrolyte is also meant to be maintenance-free, so you won’t have to worry about it. This means that you won’t have to clean the battery or perform any other maintenance tasks.


Costs less than you’d expect

Outstanding ability to call on a backup source


Slow rate of leakage

Doesn’t need any kind of upkeep

Rechargeable in a short period of time


1-year is the maximum length of the warranty.


All the time, the performance of your car is determined by the battery’s juice box. That’s why it’s important to have it checked out on a regular basis and, if necessary, to obtain a new one. If you’re in the market for a new group 31 battery, keep reading to learn about some of the top options on the market. You can count on them to deliver on their promises and live up to the high expectations you have for them.