A battery group size is an industry-standard for car batteries that indicates the actual, physical size for a car battery (Height x width x length), as well as the polarity (where the positive and negative battery posts are located on the battery), allowing the vehicle manufacturers to take the battery size into consideration when designing a car, truck, SUV or other vehicles. Battery group sizes also provide a simplified, industry standard in automotive batteries, helping manufacturers of batteries and vehicles alike to reduce costs. Having standard battery group sizes makes replacing your battery at your local Firestone Complete Auto Care store simple, and our technicians and automotive advisors can ensure the proper battery fitment for just about any vehicle on the road.
Japanese vehicles, many other imports and most American-made vehicles typically use a group size with a standard, top-post battery fitments. These are the most-common battery group sizes that most people are used to seeing. While these are more common and seem easier to replace, it is still important to use the proper group size so that your car battery stays secure in your vehicle's battery tray. For example, some group sizes are the same width and length, but have a lower height. If a taller battery is mistaken for a shorter group size, it may not fit properly in the battery tray and/or battery hold-down, or the battery post could even make contact with the metal hood of the vehicle, causing a spark, a short or a vehicle fire. Again, as a precaution, please consult with your Firestone technicians for the proper battery fitment for your specific vehicle year, make and model. In general, these more-common battery group sizes are 24, 24F, 25, 34, 35, 51, 51R, 52, 58, 58R, 59, and 65.
The long history of disposable dry cells means that many different manufacturer-specific and national standards were used to designate sizes, long before international standards were agreed upon. Technical standards for battery sizes and types are published by such as (IEC) and (ANSI). Many popular sizes are still referred to by old standard or manufacturer designations, and some non-systematic designations have been included in current international standards due to wide use.