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Aqua-Jet Aqua-Jet SX1 Battery

1989–1992. The OEM battery case the Aqua-Jet SX1 takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.

Your Ride
Year
Make
Model
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Your ride

1992 Aqua-Jet Aqua-Jet SX1

Not yours?
OEM battery
YB16-BYuasa 2026 OEM guide
Case family
YB16-B12V starter case
Fits all years
1989–1992same case every year on file

The Aqua-Jet Aqua-Jet SX1 takes the YB16-B case. The Ionic S6 is a drop-in for that case: 720 cranking amps, 4.4 lb.

See the Ionic S6
Fits your ski
720CA
Ionic Lithium S6 12V ATV Starter Battery (720CA)Starter
Ionic

Ionic Lithium S6 12V ATV Starter Battery (720CA)

12V·720CA·4.4 lb
$149
$169Save $20
5-yr warranty · Ships in 3-5 days

Aqua-Jet SX1 battery by model year

1989–1992Your year · 1992OEM batteryYB16-B12V starter caseWhere it comes fromYuasa 2026 OEM guideLithium that fitsIonic S6 →

Trim covered: Aqua-Jet SX1.

Shop all Aqua-Jet Jet Ski batteries

What the Aqua-Jet SX1 needs, in plain English

Every Aqua-Jet SX1 from the first 1989 model through 1992 starts on the YB16-B case, a 12-volt starter battery. Aqua-Jet 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 Ionic S6: 720 cranking amps, 4.4 pounds, the same case in lithium. Charge it with a lithium-compatible charger or maintainer for the off-season and it outlasts the lead-acid battery it replaces by years.

What size battery does an Aqua-Jet Aqua-Jet SX1 take?+
The YB16-B case, the same one on every Aqua-Jet SX1 from 1989 to 1992. The Ionic S6 is the lithium drop-in for it.
Will a lithium battery work in an Aqua-Jet SX1 without changes?+
Yes, on a ski with a healthy charging system: the lithium battery uses the same case, the same posts and the same cables, and it drops in where the lead-acid battery sat. Check that the stator and regulator hold a steady charge, fill any gap in the tray with the foam spacers most lithium jet ski batteries include, and match the terminal layout of the battery you are replacing.
Do I need a different charger for a lithium jet ski battery?+
Use a charger or maintainer with a lithium (LiFePO4) mode. A lead-acid trickle charger can push the wrong voltage profile, and a desulfation mode can damage a lithium pack. A lithium-profile maintainer over the off-season keeps it topped without harm, and the battery loses only a few percent of charge a month sitting on its own.