Triumph Bonneville T100 Battery
2002–2020. Triumph changed the Bonneville T100's battery three times 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.
2020 Triumph Bonneville T100
- OEM battery
- YTX9-BSYuasa 2026 OEM guide
- Case family
- YTZ1012V starter case
- This battery fits
- 2019–2020other years take a different case
The Triumph Bonneville T100 takes the YTX9-BS case. The Antigravity ATZ-10 RE-START is a drop-in for that case: 360 cranking amps, 2.6 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity ATZ-10
Bonneville T100 battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 2002–2007 | 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 → |
| 2008–2010 | OEM batteryYT12B-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity AT12BS RE-START →Antigravity AT12BS-HD RE-START → |
| 2011–2018 | 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 → |
| 2019–2020Your year · 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 → |
4 trims covered: Bonneville T100, Bonneville T100 800, Bonneville T100 865, Bonneville T100 900.
Shop all Triumph batteriesWhy the year matters on this one
The Bonneville T100 is a motorcycle where the battery changed mid-run: 2002 to 2007 takes the YTX12-BS, 2008 to 2010 the YT12B-BS, 2011 to 2018 the YTX12-BS and 2019 to 2020 the YTX9-BS. 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 2019 to 2020 that means the Antigravity ATZ-10 RE-START: 360 cranking amps, 2.6 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.