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Car Battery Group Size Finder – Online Year/Make/Model

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Car Battery Group Size Finder

Find the correct BCI battery group size for your vehicle by selecting the Year, Make, and Model. Get detailed specifications including dimensions, CCA, and terminal types.

Recommended Battery Group Size
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Dimensions (L×W×H)
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Terminal
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CCA Range
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No exact match found for this selection.

Try selecting a different year or check your owner's manual. You can also measure your battery tray and compare with our size chart below.

BCI Battery Group Size Reference Chart

Common BCI battery group sizes with physical dimensions and specifications.

Group Size L × W × H (inches) L × W × H (mm) Terminal Typical CCA Common Applications
24 / 24F10.25 × 6.81 × 8.88260 × 173 × 225Top Post600–800SUVs, Trucks, Sedans
27 / 27F12.06 × 6.81 × 8.88306 × 173 × 225Top Post650–900Large SUVs, Trucks
34 / 34R10.25 × 6.81 × 7.88260 × 173 × 200Top Post600–800Chrysler, Dodge, Jeep
359.06 × 6.88 × 8.88230 × 175 × 225Top Post500–700Toyota, Honda, Subaru, Mazda
47 (H5)9.56 × 6.94 × 7.50243 × 176 × 190Top Post550–750Hyundai, Kia, VW, Chevy
48 (H6)11.00 × 6.94 × 7.50279 × 176 × 190Top Post600–800GM Trucks, Jeep, RAM, Euro
49 (H8)14.94 × 6.94 × 7.50379 × 176 × 190Top Post700–950BMW, Mercedes, Audi
51 / 51R9.38 × 5.06 × 8.75238 × 129 × 222Top Post400–550Honda Civic, Compact Cars
6512.06 × 7.50 × 7.56306 × 190 × 192Top Post650–850Ford F-150, Large Trucks
7810.25 × 7.06 × 7.75260 × 179 × 197Side Post600–800GM Vehicles
94R (H7)12.44 × 6.94 × 7.50316 × 176 × 190Top Post (R)700–900BMW, Audi, Mercedes
96R9.56 × 6.94 × 7.50243 × 176 × 190Top Post (R)500–700Ford, Mazda, Some Imports
121R8.19 × 6.94 × 7.50208 × 176 × 190Top Post (R)400–550Subcompact Cars
Frequently Asked Questions

A car battery group size is a standardized code assigned by the Battery Council International (BCI) that defines the physical dimensions, terminal placement, and terminal type of a battery. This ensures that the battery fits correctly in your vehicle's battery tray and connects properly to the cables. Common group sizes include 24, 35, 48 (H6), 49 (H8), 65, and 94R (H7).

"F" (Flat/Forward): Indicates the positive terminal is on the left side when facing the battery from the front. Group 24F and 27F are common examples used in many Japanese vehicles.

"R" (Reverse): Indicates the positive terminal is on the right side. Group 34R, 51R, and 94R are examples. Using the wrong terminal orientation can prevent your battery cables from reaching the terminals safely.

It is strongly recommended to use the manufacturer-specified group size. Using a different size may result in:
• Poor fitment: Battery may not sit securely in the tray
• Terminal issues: Cables may not reach or could short against the hood
• Hold-down incompatibility: The battery clamp may not secure the battery properly
• Vibration damage: A loose battery can suffer internal damage
However, some vehicles can accept multiple group sizes. Always consult your owner's manual or a professional before switching sizes.

CCA (Cold Cranking Amps) measures a battery's ability to start an engine at 0°F (-18°C). It represents the number of amps a battery can deliver for 30 seconds while maintaining at least 7.2 volts. Higher CCA is particularly important in cold climates. Always choose a battery with a CCA rating that meets or exceeds your vehicle manufacturer's recommendation.

AGM (Absorbent Glass Mat): Sealed, spill-proof, vibration-resistant, and ideal for vehicles with start-stop systems or high electrical demands. Longer lifespan but more expensive.

Flooded (Lead-Acid): Traditional wet-cell battery, more affordable, requires periodic maintenance. Suitable for standard vehicles without advanced electronics.

Many modern European vehicles (BMW, Mercedes, Audi) require AGM batteries due to their charging systems. Always check your owner's manual.

Most car batteries last between 3 to 5 years. Factors that affect battery life include climate (extreme heat or cold), driving habits (frequent short trips), and electrical load. Signs of a failing battery include slow engine cranking, dimming headlights, and the battery warning light on the dashboard. Have your battery tested annually after the 3-year mark.
Measure First

Always measure your battery tray (length × width × height) before purchasing. Even within the same group size, slight variations exist between brands.

Check Terminal Position

Confirm whether your positive terminal is on the left or right. An "F" or "R" suffix can make the difference between a perfect fit and a cable that won't reach.

Consult Your Manual

Your owner's manual is the definitive source for the correct battery specifications. This tool provides recommendations but always verify.

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