Car Battery Sizes report

Batteries are an indispensable part of automobiles and can be divided into traditional lead-acid batteries and maintenance-free batteries. Because the lead-calcium alloy is used as the grid for the lead storage battery, the amount of water decomposition produced during charging is small, and the sulfuric acid gas released is also very small. , Long battery storage time and other advantages.

The expected life of the car battery is 27 months. Generally, family cars are more power-efficient, and many new cars can last for 3-4 years. Several factors that affect car battery life are vehicle conditions, road conditions, and driver's driving habits. Uninterrupted use of the starter will cause the car battery to be damaged due to over-discharge when starting the car. The correct way is that the total time to start the car each time is no more than 5 seconds, and the interval between restarts is no less than 15 seconds. In daily driving, you should always check whether the small holes on the battery cover are ventilated.

As the car's power source, the battery is mainly used to supply power to the car starter and various electrical equipment when starting. When replacing a new battery, the capacity and rating of the new battery must not be lower than the original battery, and you must understand the correct car battery size. The models of lead-acid batteries for automobiles are named according to specific standards. The following article will introduce the most common car battery sizes you should know.

Car Battery Types

Nowadays, many brands of car batteries are on the market, and car batteries produced by various manufacturers also have different size labels. It pays to know the basics of batteries so you can ensure the expert care of your car. Before choosing the right size, you should know what type of car battery is right for your vehicle. There are two basic battery types below, wet cell and VRLA batteries.

Wet Cell Batteries

Wet cell batteries are lead-acid batteries that are specifically designed for automotive use. It is the original rechargeable battery and contains a liquid electrolyte. Some lead-acid batteries require maintenance, as the water in the diluted acid can evaporate and may need to be topped off from time to time to maintain the specific ratio of water to acid. Some modern wet cell batteries use a semi-solid electrolyte which is Non-maintenance free batteries. There are two popular types of wet cell batteries: SLI batteries and deep cycle batteries.

• SLI batteries: SLI means starting, lighting, and ignition. SLI batteries are designed to start your car with fast, short bursts of energy that power the motor, the lights, and the vehicle’s engine.
• Deep cycle battery: Deep cycle batteries can last longer than SLI batteries and are designed for long-term energy delivery.

VRLA Batteries

The VRLA battery is a sealed battery with no venting of gases. These batteries are ideal for use in small spaces with no ventilation, and since they are sealed, they can be easily stored. VRLA batteries do not leak or release hydrogen gas and are considered the safest wet cell lead-acid battery. There are two popular types of VRLA batteries: the gel cell battery and the AGM battery.

• Gel cell batteries: They are incredibly resistant to hot temperatures, spillage, physical shock, and electrolyte evaporation. Gel batteries function like wet cell batteries, except they are sealed and dry.
• AGM battery: An absorbed glass mat battery (AGM battery) is designed with the electrolyte held in glass mats. They work just like wet cell batteries but without the potential for spilled battery acid.

Car Battery Size Guide

A battery group size is an industry-standard for car batteries that shows the physical size for a car battery (height x width x length) and the polarity. The battery group sizes make it easy for vehicle manufacturers to consider the battery size when designing a car, truck, or SUV. The Battery Council International (BCI) has created group sizes that provide a battery's exact length, width, and height in inches and millimeters. You can find the group size chart below.

BCI battery Group size chart

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Side-Post Batteries

Many General Motors vehicles use a side-post battery. Side post batteries have cable ends that screw into the side of the battery, as opposed to having battery posts on the top of the battery. These group sizes are typically 70, 74, 75, and 78.

Recessed Top Post Batteries

European vehicle manufacturers like Volkswagen, Audi, Mercedes Benz, BMW, etc., typically use an "international" type of battery where the top posts are recessed in the corners. The top of the battery posts is about equivalent to the main height of the battery.

Standard Top Post Batteries

Japanese vehicles, many imports, and most American-made vehicles typically use a group size with a standard top-post battery. These are the most-common battery group sizes that most people are used to seeing. They are more common and seem easier to replace.

Battery group sizes provide a simplified, industry standard in automotive batteries, helping manufacturers of batteries and vehicles reduce costs. You should consult your auto technician 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.