Top 5 Best Group 31 Batteries (Detailed Review)

You must be wondering what are Group 31 batteries? Group 31 batteries are comparatively larger in size and more powerful, integrating 20H capacity within the range of 75-125AH, imparting 750-1250 CCA and an RC of 150-250. Talking about their dimensions, these powerful batteries estimate around 13×6.8×9.44 inches according to the standards of the International Battery Council.

Group 31 batteries are destined to be utilized in marine, automotive, and off-the-grid setups.

Review of Top 5 Best Group 31 Deep Cycle Batteries:

Looking for the correct alternate battery for your vehicle isn’t simple, particularly with endless brands and battery choices available. We’ve made things simpler for you by doing all the difficult work and handpicking probably the most ideal choices accessible. By contrasting their specifications, consumer reviews, cost, and extent of power, we present the option to choose the 5 best Group 31 cycle batteries that could be your ideal fit.

Product List Buy From
VMAX MR137-120 AGM Sealed Marine AGM Battery
Odyssey 31-PC2150S Heavy Duty Commercial Battery
Optima Batteries 8052-161 D31M
31 Series Marine Battery
Deka East Penn 8A31DTM

VMAX MR137-120 AGM Sealed Marine AGM Battery

group 31 batteryProduct Features:

  • Weight 50lb-110lb
  • Dimensions 13×6.8x 8.8h
  • CCA 900A
  • HCA 1740A
    Capacity 120ah
  • Voltage 12V
  • Reserve Capacity 230 min

Our Review:

Considering performance and longevity within an affordable price range, VMAX MR137-120 AGM is a perfect option as a substitute for your 31 Group battery.

VMAX MR 137-120 integrates an Electrolyte Suspension system that consists of Absorbed Glass Matte ( AGM ) with high porosity that has an advanced absorbing capacity as compared to an ordinary silica gel and other conventional impurities. This makes the battery efficient in performance and eliminates the risks of wear and tear and leakage.

The manufacturing and design of this classy Group 31 battery are made up of heavy-duty Lead tin alloys that provide an additional boost of performance and service life. Regardless of whether it is in Float or cyclic application, the VMAX never compromises on performance.

Just as an elite battery that ignites your vehicle over an extended period of time, it also features a heavy-duty battery with an AGM design that ensures durability and prevents the leakage of acid even with prolonged tenure of usage. Moreover, VMAX offers maintenance-free operation which means you need not to hassle in changing the water and acid or monitor the gravity of the electrolytes during floating applications at regular intervals.

  • Heavy-duty grid
  • Maintenance-free operation
  • Absorbed Glass Matte
  • Resistant to shock and vibrations
  • Non-spillable and non-hazardous
  • Durable
  • Good value for money
  • Relatively pricey

Odyssey 31-PC2150S Heavy Duty Commercial Battery

group 31 battery

Product Features:

  • Weight 77.8 lbs
  • Dimensions 13.06 x 6.89 x 9.59 inches
  • CCA 1150A
  • Capacity 100ah
  • Voltage 12V
  • Reserve Capacity 205 min

Our Review:

This amazing Odyssey PC2150S is categorized as a heavy-duty battery that is highly durable with massive power delivery with no delay. This Group 31 battery is particularly beneficial for those who have multiple electronic tools within their vehicle that require sufficient power to keep them operating.

Odyssey PC2150S is integrated with a vibration resistance design that eliminates shock and high impact vibrations. The strong and durable lead plates are high temperature tolerant and add to the durability of this outstanding battery. The faster recharge time of any available lead battery in the market, Odyssey PC2150S is capable of getting recharged 100% in just 4-6 hours.

Moreover, this Group 31 Battery has a 70% longer cycle life compared to traditional deep cycle batteries. It exhibits up to 400 cycles at 80 percentage depth of discharge that will provide high stable voltage for longer periods of time. The AGM technology helps to prevent erosion and disintegration with non-spill able specs and a higher degree of conductivity.

  • Save time, money, and aggravation
  • Longer service life ( 3-10 years)
  • Better warranty
  • Longer cycle life
  • Non spill able
  • Anti-corrosive
  • Extreme temperature tolerant
  • AGM technology
  • High conductivity
  • Expensive but worth it

Read Our Guide On : Best Group 25 Batteries To Buy In 2021

Optima Batteries 8052-161 D31M

group 31 battery

Product Features:

  • Weight 59.8 pounds
  • Dimensions 12.8 x 6.5 x 9.38 inches
  • CCA 900 A
  • Capacity 75ah
  • Voltage 12V
  • Reserve Capacity 155 min

Our Review:

If you are looking for Group 31 Battery that has dual functionality, serves in powerful starting up as well as deep cycle power battery that does not require maintenance at regular intervals. Optima 8052-161 D31M is an ideal option for people who need a sure-starting, strong cranking, and maintenance-free power source for their boat or RV, even in harsh conditions.

The unique SpiralCell design provides a strong and clean power source, ensuring consumer safety and the safety of the environment. The SpiralCell design makes sure that the battery is highly guarded to use and lasts for a prolonged period of time as compared to its rivals. The higher reserve capacity gives you a longer shelf-life to give you the power whenever you need it.

It’s the perfect marine battery for boats with trolling motors, heavy electronic systems, and works well as an RV battery that may tend to drain batteries quickly. On top of providing outstanding vibration resistance, the BlueTop efficient power delivery and faster recharge time mean you’ll spend less time worrying about your battery.

Optima offers extreme tolerance to temperatures, humidity, and automated processes are maintained and constantly monitored.

  • X3 more recharges as compared to other batteries
  • X15 more vibration resistance
  • Non spillable
  • Mount in any position
  • Maintenance-free
  • Perfect boat battery or RV battery
  • Quick recharge time
  • Not durable enough

31 Series Marine Battery

group 31 battery

Product Features:

  • Weight 52.6 pounds
  • Dimensions 13 x 6.70 x 9.04 inches
  • CCA 800 A
  • Capacity 105ah
  • Voltage 12V
  • Reserve Capacity 190 min

Our Review:

The Marine Battery presented by Banshee is an ideal Group 31 Battery that features AGM technology and dual terminal, ensuring maximum power delivery and a high level of performance in starting up your vehicle even in extremely cold weather.

The Banshee Marine Battery is integrated with a built-in Hydrometer that easily determines the state of your battery life.

Banshee 31 Series is equipped with more battery plates providing an extended surface area that will trigger the power twice as much as the conventional batteries. These batteries are designed to withstand prolong rigorous deep charges as well as slow charges. The Enhanced Flooded Battery technology is an enhanced version of standard wet-flooded technology. The primary benefits of EFB technology exhibited in the Banshee are improved charge acceptance and greater cyclic durability when operating in a reduced state of charge.

Banshee Group 31 marine battery is rugged, powerful, resilient, and is among the only battery you rely on for cranking, igniting, and lighting.

  • 2 years warranty
  • Replaces Optima D31M 8052
  • Dual post terminals
  • Impressive voltage and Ampere/ hr capacity
  • 80% depth of discharge
  • Higher internal resistance
  • Flip-up handle
  • Battery indicating hydrometer
  • Liquid battery, cannot be mounted in every position

Deka East Penn 8A31DTM

group 31 battery

Product Features:

  • Weight 9 pounds
  • Dimensions 12.94 x 6.75 x 9.38 inches
  • CCA 800 A
  • Capacity 105ah
  • Voltage 12V
  • Reserve Capacity 210 min

Our Review:

The Deka Penn 8A31DTM is a perfect heavy-duty Group 31 battery for heavy marine vehicles that not only powers up the marine but also provides power to electrical pieces of equipment in your vehicle.

The battery gives the adequate capacity to begin and keep your motor running for a significantly long period of time with no recognizable plunges in execution, similarly can flexibly operate various electronic tools conveniently.

Deka East Penn integrates AGM technology that provides a sealed, non-spillable, and maintenance-free performance. This AGM prevents the spilling of acid as well as prevents the hassle of changing water and electrolyte monitoring at frequent times.

Many Group 31 batteries are difficult to recharge, but Deka Penn has a boosted charging capacity with relatively slow discharge rate, estimated at 2% per month, retaining enough charge after being inactive for weeks.

  • Affordable in price
  • AGM design
  • Slow discharge rate
  • Maintenance-free
  • Boosted recharge time
  • Avoid spills
  • Offers limited warranty

Advantages of Group 31 Batteries:

  • The Group 31 batteries do not require maintenance at frequent intervals.
  • Charge x5 times faster with Flooded technology.
  • Highly spill-proof with AGM technology.
  • Can withstand extreme weather conditions.
  • Integrates shock and vibration resistance.
  • Offers long functionality with deep cycles.

Group 31 Battery Buying Guide – Things to Consider

Overview of Group 31 Batteries:

A group 31 deep cycle battery, as defined by the Battery Council International (BCI), is a battery that belongs to this group. Besides being used in vehicles, boats, and remote power sources, Group 31 batteries have also become popular. By deep cycle battery, we mean a battery that can be discharged and recharged many times.

Size or Dimension:

Group 31 designations identify primarily the battery’s size and do not give insight into its power, even though it can affect energy production. 13 inches long, 6 13/18 inches wide, and 9 7/16 inches tall are the dimensions of Group 31 batteries. These batteries are larger than those belonging to Group 29NF. On top of that, Group 31 batteries are shorter than Group 29H batteries, yet they are taller and wider as well.

The Power Ratio:

The average rated capacity of Group 31 batteries ranges between 75 and 125 Ah. There is a CCA range of 600 to 1150 amps. The lithium Group 31 batteries are capable of delivering the same level of power as the lead-acid batteries. Despite this, lithium batteries offer more charge and discharge cycles than other batteries.

Dual-Purpose Battery:

Besides starting batteries and deep cycle batteries, it also offers dual-purpose batteries in group 31. In addition to being popular batteries, these models also have impressive features. Batteries that are dual-purpose perform perfectly under deep discharge.

Battery weight:

The weight of a Group 31 lead-acid battery is usually in the range of 60 to 75 lbs. The battery weighs much more than other types. Since they are made up of a liquid mixture of sulfuric acid and water, they weigh more than lead-acid batteries. In contrast, lithium Group 31 batteries typically weigh between 28 and 30 lbs.

Group 31 battery usage:

Heavy motorized vehicles, such as ambulances, fire engines, and other heavy vehicles usually require a long-lasting, reliable battery to start the ignition, which is why groups 31 batteries are commonly used in them.

People Might Ask

What is the life expectancy of a group 31 battery?

Batteries of group 31 have a lifespan of 150-250 minutes. There is a battery capacity of 750-1250 CCA in this model. Additionally, the dimensions of this group 31 battery are 13’x 6’x 97/16.

What does Group 31 on a battery mean?

The Battery Council International (BCI) classifies group 31 deep cycle batteries as deep cycle batteries. Deep cycle batteries, such as a group 31 battery, are designed to go through multiple discharge and charge cycles.

How do deep cycle batteries differ from marine batteries?

A marine battery can be a starting battery, a dual-purpose battery, or a deep cycle battery. Generally, such batteries are a hybrid between a starting battery and deep cycle battery containing lead sponge plates that are heavier and coarser than those of starting batteries, but not thick enough for deep cycling.

What is the life expectancy of Deka batteries?

Generally, these batteries last upto 3 to 5 years but the majority of them fail before that. It all depends on several factors, such as the climate you live in, the location of the battery, and the health of your charging system.

What is the best battery: the Odyssey or Optima?

Despite the fact that the Odyssey is a perfectly good battery for most users, the Optima simply outperforms it in virtually every aspect. In addition to achieving more cold-cranking amps 620 vs 170, the Optima offers more amps on the whole 48 vs 18 and the warranty on the unit is also much longer, three years vs two.

What are the best ways to maintain deep cycle AGM batteries?

Whenever you store an AGM battery for an extended period, it is important that you recharge it. You should ensure your battery is kept in a place with sufficient ventilation and that it remains cool and dry. Sulfation can occur if your battery is left discharged for prolonged periods of time.

Is there anything special about 31 series batteries?

Battery Group 31 devices have a battery capacity of 20h in the 75-125 Ah range, and they have a capacity of 750-1250 CCA, 150-250 minutes of runtime, etc. Group 31 batteries are among the most commonly used battery types in marine, motor vehicle and similar applications.


Group 31 batteries are available in a wide variety in the market, each sparkling with its own specifications and pros and cons. Selecting the best option can be a bone-breaking and time-consuming task. To spare your effort and time, we have presented the aforementioned list of the best Group 31 batteries that are affordable in price and efficient in performance, do worth your investment. Happy Shopping!

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