![]() You need to remember that a larger battery will usually have more power and reserve capacity than a smaller unit. Some vehicles can handle a larger battery than what is stated in the owner’s manual. In terms of group size, standard top post batteries are typically group 24, group24F, group 25, group 34, group 35, group 51, group 51R, group 52, group 58, group 58R, group 59, and group 65.īut don’t get confused. However, some group sizes have the same width and length but may have a lower height. This is the most common battery group size seen in modern vehicles. For most import and some American-made vehicles, standard top post batteries are the preferred choice. The group sizes of recessed top post batteries are typically group 41, group 42, group 47, group 48, and group 49. This design is perfect if the battery is located in the trunk or under the back seat. This means the posts are almost the same height as the battery casing. More popularly known as an ‘international battery’ found in most European vehicle brands like Audi, BMW, Mercedes-Benz, and Volkswagen, this type of battery has top posts that are recessed in the corners. Side-post car batteries are typically group 70, group 74, group 75, and group 78. In fact, most vehicles manufactured by General Motors are equipped with this type of battery. As the name implies, side-post batteries have cable ends that screw on the side of the battery instead of having battery terminals on top of the unit. There are three types of car batteries according to group size: Not all cars are made the same, and some vehicles might have a different group size battery even from the same manufacturer. In order to make it clear, it’s important to know the different battery group sizes. What are the various battery group sizes? Knowing the group size is the easiest way to get a battery replacement, even if you don’t go straight to an auto care center or battery dealer. If you’re working with a used car and you can’t find the battery group size, check the owner’s manual. Instead of measuring your existing battery using a tape measure or ruler (you poor sod), you can search for the Group Size printed on the label of the old battery. The simplest and easiest way to finding a replacement battery is to determine the group size. With this standard, it provides a simple guideline in automotive batteries, which comes especially handy when it’s time for a replacement. Why is this so? Battery group sizing also has something to do with the orientation or polarity of the positive and negative posts on the battery itself. The Battery Group Size is created as an industry standard to accurately determine the physical size of the battery by measuring the Length x Width x Height.Īlso, group sizing the battery also helps manufacturers in designing the electrical system of the vehicle. Vehicle manufacturers need to seriously consider the battery size when designing a new car, truck, or SUV. So they got together and settled on Group Name. Some time back, smart people at the BCI ( Battery Council International) decided it would be a good idea to have a standard naming scheme for battery sizes. What does the group size of a car battery mean? ![]() Check out their site for more helpful battery-related resources! Battery Group SizeĪnd with that in mind, remember this: a larger group size does NOT mean a physically larger battery, and the same principle holds true for car batteries with lower number groups. In terms of actual size, group 34 batteries are smaller than group 27 but are larger than similar group 31.Ĭhart below found on. This translates roughly to 26 x 17 x 20 cm. The physical dimensions are 10.25 x 6.8125 x 7.875 inches. ![]() Of course, weight is dependent on many factors including battery type and the internal construction of the unit. In terms of weight, they usually tip the scales between 37 and 51 pounds. When you crunch the numbers, these batteries are rather powerful than you might expect. Most also provide 750-900 CCA (cold cranking amps) and around 100 to 145 minutes reserve capacity. Generally speaking, group 34 batteries have a 20h capacity in the 50 to 75 Ah range. For starters, it means the required battery size is medium-large, which means the battery is slightly bigger than medium but smaller than a large battery. If you found out your vehicle requires a group 34 battery, it means many things.
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