Buell S2 Thunderbolt Battery
1994–1996. The OEM battery case the S2 Thunderbolt takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.
1996 Buell S2 Thunderbolt
- OEM battery
- YTX20-BSYuasa 2026 OEM guide
- Case family
- YTX2012V starter case
- Fits all years
- 1994–1996same case every year on file
The Buell S2 Thunderbolt takes the YTX20-BS case. The Antigravity ATX20 RE-START is a drop-in for that case: 680 cranking amps, 4 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity ATX20
S2 Thunderbolt battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 1994–1996Your year · 1996 | OEM batteryYTX20-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 → |
Trim covered: S2 Thunderbolt.
Shop all Buell batteriesWhat the S2 Thunderbolt needs, in plain English
Every S2 Thunderbolt from the first 1994 model through 1996 starts on the YTX20-BS case, a 12-volt starter battery. Buell 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 ATX20 RE-START: 680 cranking amps, 4 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.