A battery group size is a standard set by the Battery Council International (BCI). It describes the case dimensions, the terminal type and the terminal position, so a battery of the right group fits your tray, reaches your cables and fits under the hold-down.
Reading a group size
- Numbers such as 24, 35, 51 or 65 are BCI groups, each with a fixed case size.
- R or F after the number, as in 51R or 24F, means the terminals are reversed compared to the base group. Putting in the wrong one leaves the cables too short to reach.
- H5 to H9 are European-style DIN sizes, also called L2 to L6 or LN2 to LN6. They cross over to BCI groups 47, 48, 94R, 49 and 95R.
Common sizes and approximate dimensions
Dimensions are approximate case sizes in inches (length × width × height). Always confirm the exact battery for your vehicle.
| Group | Also called | Approx. size (L × W × H) | Commonly found in | Batteries |
|---|---|---|---|---|
| 24 | — | 10.3 × 6.8 × 8.9 in | Older domestic cars and trucks that use the standard group 24 terminal layout. | Standard Gold |
| 27 | — | 12.1 × 6.8 × 8.9 in | Some full-size pickups, vans and older SUVs built for a larger battery. | Gold |
| 31 | — | 13 × 6.8 × 9.4 in | Class 8 trucks, buses, tractors and equipment, usually installed in banks of two to four batteries. | Heavy duty 31-950 Heavy duty 31-750 |
| 34 | — | 10.3 × 6.8 × 7.9 in | Many Chrysler, Dodge and Jeep vehicles, including the Jeep Wrangler JK. | Standard TotalPro Gold |
| 35 | — | 9.1 × 6.9 × 8.9 in | Many Toyota, Nissan, Subaru and Honda cars and crossovers. | Standard TotalPro Gold Platinum AGM |
| 51 | — | 9.4 × 5.1 × 8.8 in | Older Honda and other compact cars with the standard group 51 terminal layout. | Standard |
| 65 | — | 12.1 × 7.5 × 7.6 in | Ford and Lincoln trucks and SUVs, including many F-150 and Expedition models. | Standard TotalPro Gold Platinum AGM |
| 75 | — | 9.1 × 7.1 × 7.3 in | GM cars and light trucks with side terminals. | Standard Gold |
| 78 | — | 10.3 × 7.1 × 7.3 in | GM side-terminal trucks, vans and SUVs. | Standard Gold |
| H4 (140R) | 140R, LN1, L1 | 8.1 × 6.9 × 7.5 in | Compact cars and small crossovers, including many recent Toyota models such as the Corolla. | Standard Gold |
| H5 (47) | 47, L2, LN2 | 9.5 × 6.9 × 7.5 in | Compact and mid-size cars and crossovers, including many Chevrolet, Buick, Volkswagen, Fiat, Hyundai and Kia models. | Standard TotalPro Gold Platinum AGM |
| H6 (48) | 48, L3, LN3 | 10.9 × 6.9 × 7.5 in | One of the most common sizes on late-model vehicles: many GM trucks and SUVs, Jeep, Volkswagen, Audi and BMW models. | Standard TotalPro Gold Platinum AGM |
| H7 (94R) | 94R, L4, LN4 | 12.4 × 6.9 × 7.5 in | Full-size trucks, SUVs and larger cars, including many Ram, Dodge, Jeep, Ford and European models. | Standard TotalPro Gold Platinum AGM |
| H8 (49) | 49, L5, LN5 | 13.9 × 6.9 × 7.5 in | Larger European and luxury vehicles, such as many BMW, Mercedes-Benz and Audi models. | Standard Platinum AGM |
| H9 (95R) | 95R, L6, LN6 | 15.5 × 6.9 × 7.5 in | Large luxury sedans and SUVs with high electrical demand, including some Land Rover, Volvo and Audi models. | Standard Platinum AGM |
| 24F | — | 10.3 × 6.8 × 8.9 in | Many Toyota, Lexus, Honda and Acura V6 models, plus some pickups. | Standard TotalPro Gold Platinum AGM |
| 51R | — | 9.4 × 5.1 × 8.8 in | Honda and Acura compacts and crossovers such as the Civic, CR-V and Fit, plus many Mazda and Nissan small cars. | Standard TotalPro Gold |
| 27F | — | 12.1 × 6.8 × 8.9 in | Some full-size trucks and SUVs, often Toyota and Lexus V8 models. | Standard Gold |
| 26R | — | 8.2 × 6.8 × 7.8 in | Older compact cars, including some Toyota, Honda and Ford models. | Standard |
| 96R | — | 9.6 × 6.9 × 6.9 in | Many Ford compacts and small SUVs. | Standard TotalPro Gold |
| 4D | — | 20.8 × 8.8 × 9.9 in | Construction equipment, older trucks, buses and large marine engines. | Heavy duty |
| 8D | — | 20.8 × 11 × 9.9 in | Bulldozers, loaders and other heavy equipment with large diesel engines. | Heavy duty |
How to find your vehicle’s size
- Look at the label on your current battery for the group number.
- Check the owner’s manual specifications section.
- Use our battery finder with your year, make and model or your VIN.
Group size is only part of the match. Cold cranking amps, AGM or flooded and any registration needs matter too, which is why we confirm every battery from the VIN before dispatch.