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Group 90 battery size

A group 90 car battery is at most 9.53 inches long, 6.89 wide and 6.89 tall (242 x 175 x 175 mm), with top posts.

Length
9.53 in (242 mm)
Width
6.89 in (175 mm)
Height
6.89 in (175 mm)
Terminals
top posts
Group 90, drawn to scale, in inches (the same scale on every group page)
Front9.53 in6.89 inTop9.53 in6.89 in

Same box, other group numbers

  • Group 42: 9.53 x 6.89 x 6.89 in, different terminal layout (BCI figure 15, not 24).
  • Group 96R: 9.53 x 6.89 x 6.89 in, different terminal layout (BCI figure 15, not 24).

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 90 battery

  • Read the group number on the label of the battery in your car, or in the owner's manual: it should say 90.
  • 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 90 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 90

  • Group 90 is the size that European sizing calls T5; East Penn and PartSource also write LB2.1,2,3,4
  • Spec sheets list the positive terminal of a group 90 battery on the right.1,3,4,5,6
  • Group 90 is as long and wide as a group 47 (H5), 242 x 175 mm, but lower: 175 mm high against 190 mm.1,2
  • Retailers list group 90 (T5) for some Ford models, such as certain years of the Ford Edge.7,8
  • The T5 label and the 242 x 175 x 175 mm box are shared with group 42.1,2

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. BCI group numbers, dimensional specifications and ratings, Battery Council International
  2. Automotive battery specifications (2740), East Penn Manufacturing (Deka)
  3. MPS90 MagnaPower Silver battery, PartSource
  4. Super Start Extreme top post battery, group size 90/T5, O'Reilly Auto Parts
  5. Duracell Ultra SLI90T5, Batteries Plus
  6. Battery BCI group numbers, dimensional specifications, polarity and terminals (bulletin 5300270), Cummins Inc.
  7. MTP-90/T5, Interstate Batteries
  8. 2015 Ford Edge batteries, Advance Auto Parts

Group 90 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; Jalopnik, Viraaj Bhatnagar, "What the BCI group size number on your car battery means" (jalopnik.com), September 6, 2026; Battery Mart, "Group 51R batteries" (batterymart.com), read October 16, 2026.