Triumph Thunderbird Sport Battery
2002–2003. The OEM battery case the Thunderbird Sport takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.
2003 Triumph Thunderbird Sport
- OEM battery
- YTX14AHL-BSYuasa 2026 OEM guide
- Case family
- YTX14AL12V starter case
- Fits all years
- 2002–2003same case every year on file
The Triumph Thunderbird Sport takes the YTX14AHL-BS case. The Antigravity ATX12-AH 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-AH
Thunderbird Sport battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 2002–2003Your year · 2003 | OEM batteryYTX14AHL-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity ATX12-AH RE-START → |
Trim covered: Thunderbird Sport.
Shop all Triumph batteriesWhat the Thunderbird Sport needs, in plain English
Every Thunderbird Sport from the first 2002 model through 2003 starts on the YTX14AHL-BS case, a 12-volt starter battery. Triumph ships it with a lead-acid battery that starts to fade after two or three seasons of short rides and off-season storage, and that is usually the day a rider goes looking for something better.
The lithium drop-in is the Antigravity ATX12-AH 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.