2023-2026 Honda Accord Battery Size
1.5T (2023-2025): H5; Hybrid 2.0L (12V battery) (2023-2025): 51. Source: Honda's genuine-parts catalog (Honda part numbers in the table). Confirm against the label on the battery in your car before ordering.
Battery finder
Select your Accord year and engine. Each size is the replacement battery Honda's parts catalog lists for it (part numbers in the chart below); confirm against the label on your battery before buying.
Honda's catalog does not list a 2026 Accord yet; check the label on a 2026 car.
See recommended batteriesFor the 2023-2025 Accord with the 1.5-liter turbo, Honda's parts catalog lists an H5 EFB, part 31500-TLA-EFB100M, the same battery it lists for the 2021-2022 1.5T. EFB means enhanced flooded battery, and it is not an AGM. The 2023-2025 hybrid's 12-volt battery is a Group 51, part 31500-SB2-100M. That small battery is separate from the high-voltage pack, and it's a 51, not the mirror-image 51R used in older four-cylinder Accords. There's no 2.0-liter turbo in this generation. Honda's catalog doesn't list a 2026 Accord yet, so if you own one, go by the label on the battery that's in it. The part Honda sells today can also differ from what left the factory.
| Engine / trim | Group size | CCA | Type | Honda part no. | Notes | Shop |
|---|---|---|---|---|---|---|
| 1.5T (2023-2025) | H5 | Not listed | EFB | 31500-TLA-EFB100M “BATTERY (H5EFB)” | Honda's catalog does not list a 2026 Accord yet; check the label on a 2026 car. | Shop ▸ |
| Hybrid 2.0L (12V battery) (2023-2025) | 51 | Not listed | Not listed | 31500-SB2-100M “Battery Assembly (51/500Amp85)” | This is the 12V battery, separate from the high-voltage pack. Group 51, not 51R. | Shop ▸ |
What to check before buying
- Group size: this controls physical fit, hold-down, and terminal position.
- Terminal direction: 51R has reversed terminals; 51 and 51R are not interchangeable.
- CCA: match or exceed the rating on your current battery in the same group size.
- Type: match the type printed on your current battery (flooded, EFB or AGM).