2018-2022 Honda Accord Battery Size
1.5T (2018-2020): LN2; 1.5T (2021-2022): H5; 2.0T: H6; Hybrid 2.0L (12V battery): 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.
LN2 is the European (DIN) case code; US stores usually sell this case as H5 or Group 47.
See recommended batteriesHonda's parts catalog lists a different 12-volt battery for each 2018-2022 Accord powertrain, and the 1.5-liter turbo changes partway through. From 2018 to 2020 it lists part 31500-TGG-100M, named Battery (Ln2). LN2 is a European DIN case code, and US shelves usually call that size H5 or Group 47. For 2021-2022 the part becomes 31500-TLA-EFB100M, an H5 EFB. EFB means enhanced flooded battery, which is not AGM. The 2.0-liter turbo in the Sport 2.0, EX-L 2.0 and Touring 2.0 lists an H6, also sold as Group 48, part 31500-TZ3-100M, and it's a flooded battery. The hybrid's 12-volt is a Group 51, part 31500-SB2-100M, separate from the high-voltage pack. The label on your current battery is the final word.
| Engine / trim | Group size | CCA | Type | Honda part no. | Notes | Shop |
|---|---|---|---|---|---|---|
| 1.5T (2018-2020) | LN2 | Not listed | Not listed | 31500-TGG-100M “Battery (Ln2)” | LN2 is the European (DIN) case code; US stores usually sell this case as H5 or Group 47. | Shop ▸ |
| 1.5T (2021-2022) | H5 | Not listed | EFB | 31500-TLA-EFB100M “BATTERY (H5EFB)” | Honda's part is an EFB (enhanced flooded) battery, not AGM. | Shop ▸ |
| 2.0T | H6 | Not listed | Flooded | 31500-TZ3-100M “Battery (H6/Fla)” | Honda's part name marks this H6 as flooded (Fla). H6 is also sold as Group 48. | Shop ▸ |
| Hybrid 2.0L (12V battery) | 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).