Car Tire Size / Car battery size / Group 34
Group 34 battery size
A group 34 car battery is at most 10.24 inches long, 6.81 wide and 7.87 tall (260 x 173 x 200 mm), with top posts.
- Length
- 10.24 in (260 mm)
- Width
- 6.81 in (173 mm)
- Height
- 7.87 in (200 mm)
- Terminals
- top posts
Same box, other group numbers
- Group 34R: 10.24 x 6.81 x 7.87 in, different terminal layout (BCI figure 11, not 10).
Same box does not mean same battery: if the terminals are on the other side, the cables may not reach.
Close in size
Groups within 10 mm (0.4 in) on every side:
- Group 36R: 10.35 x 7.20 x 8.11 in, different terminal layout (BCI figure 19, not 10).
- Group 97R: 9.92 x 6.89 x 7.48 in, different terminal layout (BCI figure 15, not 10).
Before you buy a group 34 battery
- Read the group number on the label of the battery in your car, or in the owner's manual: it should say 34.
- A group with an "R" after the number has its terminals reversed: do not swap one for the other without checking where your cables reach.
- Choose cold cranking amps (CCA) at least as high as the original, especially for cold winters.
- Group 34 has top posts: the new battery must match, and the hold-down must fit the box.
- Most stores take the old battery back for recycling, often against a core charge.
Group 34 batteries listed on eBay
Dimensions are the BCI maximums for the case, terminals excluded. Sources: Battery Council International, "BCI Group Numbers, Dimensional Specifications and Ratings" (batterycouncil.org), read October 15, 2026; Power Tool Insider, "Car Battery Group Size Chart" (powertoolsinsider.com), updated October 7, 2026.