Group 24 battery size

Close in size

Groups within 10 mm (0.4 in) on every side:

• Group 124R: 10.31 x 6.97 x 8.58 in, different terminal layout (BCI figure 11H, not 10).

Before you buy a group 24 battery

• Read the group number on the label of the battery in your car, or in the owner's manual: it should say 24.
• 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.
• Measure your battery tray and the room above it, then compare with the size printed for the exact battery you pick, not only with the group number.
• Group 24 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.

Good to know about group 24

• Retailers' specifications list the positive terminal of a group 24 battery on the left and of a 24F on the right: the F version has its terminals swapped.^1,2,3,4,5,6
• Group 24 is also sold as marine and RV batteries, in deep-cycle and dual-purpose (starting and cycling) versions.^7,8,9,10
• Marine group 24 batteries (often labeled 24M) commonly have threaded studs as well as posts.^8,9
• AGM versions are made in group 24, and lithium (LiFePO4) deep-cycle batteries are sold in a group 24 case for RV and marine use.^9,10,11,12
• Real group 24 batteries can be longer than the 10.24 in BCI figure: NAPA and Batteries Plus list 10.75 in, and Odyssey lists 10.9 in (277 mm) for its group 24 AGM. Measure your tray before you buy.^1,2,13,14

How we checked this page

Checked on October 16, 2026. We kept a fact only when two independent sources agree, and each one is numbered to its sources below. We never write a price: the listings come straight from eBay and show what sellers ask. This page was written with an AI assistant and checked against the sources below.

Sources

1. Duracell Ultra car battery, group 24 (SLI24), Batteries Plus
2. NAPA battery BCI No. 24 (BAT 7524), NAPA Auto Parts
3. Group 24F battery (SLI24FM), Batteries Plus
4. NAPA battery BCI No. 24F (BAT 7524F), NAPA Auto Parts
5. What the BCI group size number on your car battery means (Viraaj Bhatnagar, 2026-09-06), Jalopnik
6. Group 24F batteries, Battery Mart
7. Interstate Batteries marine battery, group size 24, Pep Boys
8. Duracell Ultra marine and RV battery, group 24M (SLI24MDP), Batteries Plus
9. Odyssey marine dual purpose extreme battery, group 24 (ODX-AGM24M), Defender
10. Group 24 batteries, Battery Mart
11. 75Ah 12V group 24 LiFePO4 deep cycle battery, Battle Born Batteries
12. Dakota Lithium LiFePO4 deep cycle battery, group 24, West Marine
13. BCI group numbers, dimensional specifications and ratings, Battery Council International
14. ODYSSEY battery specifications (ODP-AGM24), EnerSys (Odyssey)