Vehicle Battery Size Calculator

Find the perfect battery for your vehicle. Select your car's make, model, and year to get the exact battery specifications including group size, CCA, and dimensions.

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Understanding Car Battery Specifications

Battery Group Sizes

Battery group sizes are standardized dimensions that ensure proper fit in your vehicle's battery tray. Common group sizes include 24F, 35, 51R, 65, 75, and 96R. Each group size has specific length, width, and height measurements, as well as terminal placement configurations.

Cold Cranking Amps (CCA)

CCA measures a battery's ability to start an engine in cold weather (0°F). Higher CCA ratings provide more starting power, which is especially important for larger engines and colder climates. Most passenger cars require 400-600 CCA, while trucks and SUVs may need 700-900 CCA.

Battery Capacity (Ah)

Ampere-hours (Ah) indicate how much electrical energy a battery can store and deliver over time. Higher Ah ratings mean longer-lasting power for accessories when the engine is off. Typical car batteries range from 45Ah to 100Ah.

Terminal Types

Car batteries typically have top post or side post terminals. Top post terminals are the most common, protruding from the top of the battery. Side post terminals are threaded posts on the side of the battery case.

Frequently Asked Questions

How do I know what size battery my car needs?

You can find your car's battery size by checking your owner's manual, looking at the existing battery label, or using our battery size calculator by selecting your vehicle's make, model, and year.

What does CCA mean in car batteries?

CCA stands for Cold Cranking Amps. It measures a battery's ability to start an engine in cold temperatures. Higher CCA ratings are better for colder climates and larger engines.

Can I use a different battery group size in my car?

It's not recommended to use a different group size as it may not fit properly in your battery tray or could have different terminal positions, potentially causing connection issues.

How long do car batteries typically last?

Most car batteries last 3-5 years, depending on climate, driving habits, and maintenance. Extreme temperatures and frequent short trips can reduce battery life.

What's the difference between Ah and CCA?

Ah (Ampere-hours) measures the battery's capacity to provide power over time, while CCA (Cold Cranking Amps) measures the battery's ability to start your engine in cold conditions.

Do I need to replace my battery with the exact same specifications?

You should match the group size and voltage exactly. CCA can be higher than original specifications, but shouldn't be significantly lower.

Why Use Our Battery Size Calculator?

Our vehicle battery size calculator takes the guesswork out of finding the right battery for your car. Simply select your vehicle's make, model, and year to instantly get the correct battery specifications. This ensures you purchase a battery that fits perfectly and provides optimal performance.