what does group size mean on a battery

Physical dimensions

What are the dimensions of a group 31 Battery?

Typically, Group 31 batteries are powerful devices measuring about 13 x 6.8 x 9.44 inches (as specified by the Battery Council International). They are designed for deep discharge and cycle operations and commonly used in automotive, marine, and off-the-grid settings.

What is Group 24 battery size?

Typically measuring 10.25″ (L) x 6.81″ (W) x 8.88″ (H), group 24 batteries are mid-size batteries that commonly come as AGM (Absorbent Glass Mat) and SLA (Sealed Lead Acid) types. Less commonly, they also come as gel-cell batteries and lithium-ion batteries. 1. ACDelco M24AGM Professional AGM Voyager Battery 2. NorthStar NSB-AGM24M Battery AGM 3.

What is a group 31 Battery?

#2 Difference: WeightGroup 27 battery weight can range from 54 to 70 poundsAs for a Group 29,these can weigh between 50 and 65 pounds.Group 31 batteries,typically,can weigh between 60 and 75 pounds.

What is a group 75 car battery?

What Is A 75 Series Battery? Generally, BCI Group 75 batteries are automotive and light-duty batteries that have a good starting performance and good features at the beginning. What Is Group Size 35 Battery? a medium size battery that have a capacity of 20h at 44-65 volts, and have a pin-count of 620 to 850 CCA, 90-130 minutes RC, etc.

What does BCI stand for?

There are a couple of different organizations that come up with these sizes/groups, including the BCI (which stands for Battery Council International, instead of the IBC) and many of their common sizes include the previously-mentioned Group 34 & 27, as well as the 31 and 35. JIS (which stands for Japanese Industrial Standard) groups include the 32C24R, 46B24R and 95E41R, among others. There’s also DIN (which stands for Deutsches Institut für Normung aka German Industrial Standard) groups, like the H6, H7 and H8 batteries.

What is a JIS battery?

JIS (which stands for Japanese Industrial Standard) groups include the 32C24R, 46B24R and 95E41R, among others. There’s also DIN (which stands for Deutsches Institut für Normung aka German Industrial Standard) groups, like the H6, H7 and H8 batteries.

What does group mean in battery?

The simple answer is that in the world of car batteries, group means size.

How Will You Read Battery Group Size?

When selecting a battery, sometimes you will hear terms like “type 28 marine” or “group 51R” battery. These numbers are given as identification of the physical size of the battery case. Currently, you will find almost 80 different categories for battery group sizes made by BCI. The group name will give you information about the intended vehicle and the usage of the battery.

What is BCI in batteries?

BCI is the short form of Battery Council International. The council works as a trade association and it handles retailer organizations, distributors, recyclers, manufacturers, etc. As far as we know, the council always works with the supply of after-market batteries that are original.

What is the trade association for batteries?

Moreover, this trade association sets the standards for specific batteries. This association identifies the testing procedures, weights, dimensions of the batteries and makes different standards for different battery types based on their weights, dimensions, and usage.

What happens if you take a battery from the wrong group?

If you take a battery from the wrong group, you may not be able to hook up the cables with the battery.

How to find out what size battery group to buy?

When you buy a new vehicle, you will get an owner’s manual with it. You can look at this manual to get the information about recommended battery group size and other specifications. In case you don’t have an owner’s manual, you can search it online. Generally, the manufacturer’s website provides such information. Similarly, you can call local automotive parts stores to find out what size battery group is right for your car.

How big is a 4D battery?

Besides, the dimension here is 20.75 x 8.75 x 9.8 inches.

Where is the positive post on a battery?

Furthermore, you know that the right side post is the positive post, and the posts are located at the top. According to different battery group sizes, group size 100 and 101 have the positive terminal post on the left, and their posts are situated on the left side of the battery. In addition to that, they also have different dimensions.

What does a high CCA rating mean?

? A high rating in the CCA or cold cranking amps helps a battery to “start” the engine of your vehicle much faster than your typical standard range .#N#? A higher than average rating for your CCA also means your battery product can deliver “start-ups” despite cold temperature conditions—hence, the “cold” cranking terminology.#N#? Though high ratings are different for everyone, most ranges that are acceptable for a broad demographic go around either a 650 in CCA or an 800 in CCA.

What does a high capacity battery mean?

? A high capacity for reserving energy or a top RC helps a battery to “hold on” to its current-voltage range or amperes, despite a long period of use or conditions of the weather—measurable by minutes.#N#? A higher than average capacity for your RC also means your battery product can avoid frequent possibilities of discharges, which can often occur when a battery “dies out” and does not get a re-charge.#N#? Though high ratings are different for everyone, most ranges that are acceptable to a broad demographic go around either a 120 in minutes as an RC or a 150 in minutes as an RC.

Why do labels use numbers?

As both a manufacturing protocol and a process for keeping track of specific these battery group sizes, labels use numbers as a way to mark the products.

Is battery size important?

The size of your batteries is essential—just as much as the size of your cars or vehicles. But, they are not everything, folks. What does battery group size mean, and are there other factors that make or break a battery? —read this piece below to explore other considerations.

Can you start with a general recommendation before you can customize for specifics?

You can start with a general recommendation before you can customize for specifics.

What is Battery Group Size?

When purchasing a battery, you will see a series of numbers and letters in the name. These numbers and letters are the BCI group size of the battery. BCI stands for Battery Council International. This is a trade association that includes manufacturers, recyclers, distributor, and retailer organizations that supply original and after-market batteries.

How many volts does a car battery hold?

Most car batteries are labeled as 12 volts. However, they can hold closer to 15 volts due to power from the alternator. When the car is running and the alternator is charging, the voltage (electrical pressure) should measure between 13.7 to 14.7 volts. An actual reading of 12.4 volts when the car is running means that the battery is only at about 75% of its optimal capacity. Your car will still run, but you need to get the battery checked because it can be a sign that it needs to be replaced soon. If it falls below 10.5 volts, your car probably will not start, but some can go as low as 9.5 volts and still seem fine.

What does BCI stand for in batteries?

These numbers and letters are the BCI group size of the battery. BCI stands for Battery Council International.

What is a BCI group number?

An example of a BCI group number is 94R. This battery group has dimensions of 12.4 x 6.9 x 7.5 inches. Its posts are located on the top and the right post is the positive terminal. Another example is a 4D group. This type of battery is intended for a commercial vehicle and has dimensions of 20.75 x 8.75 x 9.8 inches. The posts are located on the top, and the positive post is on the right. By comparison, A Group 100 and 101 are automotive batteries that have the posts located on the side, and the left post is the positive terminal.

How to charge a deep cycle battery?

You hook the battery cables to the terminal posts, turn the charger on, and wait for the recommended amount of time.

What is a 51R battery?

When choosing a battery, you will hear terms like, “ group 51R ” or “ type 31 marine ” battery. These numbers refer to the physical size of the battery case. BCI currently lists over 80 different battery group designations. The designation gives you information about the intended application and type of vehicle for which the battery is intended. It also provides the length, width, height, type of assembly, terminal positions, and which post is the positive terminal.

How to clean battery terminals?

How do you clean battery terminals and contacts? 1 Remove the battery cables and inspect them. 2 Spray the battery cleaner on the terminals. You can also mix up one tablespoon of baking soda to one cup of water and apply it to the terminals. 3 Scrub the terminals with an old toothbrush or wire brush that is made for this purpose. Scrub until all of the buildup is removed. 4 Rinse off the residue with plain water and allow the terminals to completely dry. 5 Reconnect the battery cables.

What is the BCI designation for marine batteries?

Look for starting batteries with Group Size with an M in the name, which is the BCI designation for marine and RV use. Marine batteries have different construction vs automotive.

What happens if you have issues with your boat electronics?

If you continue to have issues powering your electronics and accessories over a full day of fishing, you could have a wiring problem. Check that your boat wiring has sufficient wire gage to support the current draw of your electronics.

What is a marine battery group size?

Marine battery group size is one of many specifications found on boat batteries. The group size is simply the physical dimensions of the battery housing as set by the BCI (Battery Council International). The size can increase in either length, width, or height, so it’s important to consult the charts.

What are the accessories on a powerboat?

Modern Powerboats have many accessories to power like bilge pumps, lights, stereos, VHF radios, and fish finders.

What is the rule of thumb for deep cycle marine batteries?

For deep cycle marine batteries, the rule of thumb is the larger the Group size, the higher the Amp Hour capacity.

Can you use a dual battery for fish finders?

Consider adding a dedicated dual-purpose battery to power only your fish finders, leaving the less demanding parts on the regular cranking battery.

First Words

Batteries come in all shapes and sizes. You might have them inside your watch, phone, laptop, or any household devices, and most of all, in your car’s power supply. But what does battery group size mean? And why is it important?

What Does Battery Group Size Mean?

The pack size relates to its magnitude compatible with the vehicle’s physical measurements, terminal proximity, and model. The dimensions are usually determined by the vehicle’s manufacture, brand, and engine design.

What Is A Complex Cycle Type Of Battery?

Batteries are often described as powering devices, but they can do much more than that. In contrast to a standard automotive power source which provides energy in rapid bursts and lasts only so long before it needs new cells or charged again

Popular Battery Dimensions

Producers will offer suitable unit measures within their merchandise. The magnitudes can either be displayed in words, numbers, or both. You can find them on the surface area or sometimes stated in your car manual.

Understand About All The Battery Types

You’re probably still wondering what it signifies. As previously stated, the magnitude is necessary to match your vehicle’s particular physical dimensions and terminal positions.

How To Find The Suitable Type For Your Vehicle?

It is a vital component of any vehicle. None of the machines will be able to start without a source. The engines come to life as soon as you press the activation, all for the generated energy shoved into the combustion system by nothing more than a battery.


Eventually, after reading our post, you can understand, “what does battery group size mean”. It defines which power source you require based on your vehicle’s physical status, terminal location, and containment dimension.

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