Group 25 battery size

Same box, other group numbers

• Group 35: 9.06 x 6.89 x 8.86 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.

Before you buy a group 25 battery

• Read the group number on the label of the battery in your car, or in the owner's manual: it should say 25.
• 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 25 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 25

• Group 25 uses BCI terminal layout figure 10, like groups 24 and 51. Group 35, the same box, uses figure 11, so a 25 and a 35 have their terminals on opposite sides.^1,2
• Retailers' specifications list the positive terminal of a group 25 battery on the left.^3,4
• The Japanese (JIS) size 55D23R is cross-referenced to BCI group 25.^1,5
• Listings for group 25 do not agree on length: NAPA and Batteries Plus list 9.75 in and Odyssey 9.5 in for its AGM, longer than the 9.06 in BCI figure, while Interstate lists 9 1/16 in. Measure your tray before you buy.^3,6,7,8

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.