Yamaha Smax Battery
2015–2020. The OEM battery case the Smax takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.
2020 Yamaha Smax
- OEM battery
- YT7B-BSYuasa 2026 OEM guide
- Case family
- YT7B12V starter case
- Fits all years
- 2015–2020same case every year on file
The Yamaha Smax takes the YT7B-BS case. The Antigravity AT7B-BS RE-START is a drop-in for that case: 180 cranking amps, 1.5 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity AT7B-BS
Smax battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 2015–2020Your year · 2020 | OEM batteryYT7B-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity AT7B-BS RE-START → |
Trim covered: SMAX.
Shop all Yamaha batteriesWhat the Smax needs, in plain English
Every Smax from the first 2015 model through 2020 starts on the YT7B-BS case, a 12-volt starter battery. Yamaha 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 AT7B-BS RE-START: 180 cranking amps, 1.5 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.