Triumph Bonneville Street Twin Battery
2016–2021. Triumph changed the Bonneville Street Twin's battery twice across the run. Pick your year and we show the case that year takes and the lithium that fits it. Change any box in the strip to look up another bike.
2021 Triumph Bonneville Street Twin
- OEM battery
- ATX12Manufacturer fitment list
- Case family
- ATX1212V starter case
- This battery fits
- 2021other years take a different case
The Triumph Bonneville Street Twin takes the ATX12 case. The Antigravity ATX12 RE-START is a drop-in for that case: 360 cranking amps, 3 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity ATX12
Bonneville Street Twin battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 2016 | OEM batteryYTX12-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity ATX12 RE-START →Antigravity ATX12-HD RE-START →Ionic S4 → |
| 2017–2020 | OEM batteryYTX9-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity ATZ-10 RE-START →Antigravity ATZ-10-HD RE-START →Ionic S4 → |
| 2021Your year · 2021 | OEM batteryATX1212V starter case | Where it comes fromManufacturer fitment list | Lithium that fitsAntigravity ATX12 RE-START →Antigravity ATX12-HD RE-START → |
Trim covered: Bonneville Street Twin.
Shop all Triumph batteriesWhy the year matters on this one
The Bonneville Street Twin is a motorcycle where the battery changed mid-run: 2016 takes the YTX12-BS, 2017 to 2020 the YTX9-BS and 2021 the ATX12. The plate above names the source for each year, and the table shows every run we have on file, so match the year to the case before you order.
For 2021 that means the Antigravity ATX12 RE-START: 360 cranking amps, 3 pounds, the same case in lithium. Its RE-START function puts the battery to sleep before a parasitic draw can drain it, then wakes it with one press for a jump start. Charge it with a lithium-compatible charger or maintainer for the off-season and it outlasts the lead-acid battery it replaces by years.