Kawasaki JS440 Battery
1977–1992. Kawasaki changed the JS440's battery once 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 ski.
1992 Kawasaki JS440
- OEM battery
- YTX20HL-PWYuasa 2026 OEM guide
- Case family
- YTX20HL-PW12V starter case
- Fits all years
- 1977–1992same case every year on file
The Kawasaki JS440 takes the YTX20HL-PW 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
JS440 battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 1977–1986 | OEM batteryYTX20L-BS12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 → |
| 1987–1992Your year · 1992 | OEM batteryYTX20HL-PW12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 → |
Trim covered: JS440.
Shop all Kawasaki Jet Ski batteriesWhy the year matters on this one
The JS440 is a jet ski where the battery changed mid-run: 1977 to 1986 takes the YTX20L-BS and 1987 to 1992 the YTX20HL-PW. 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 1987 to 1992 that means 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.