Kawasaki Mule Pro-Fx 820 Battery

2016–2026. The OEM battery case the Mule Pro-Fx 820 takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.

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2026 Kawasaki Mule Pro-Fx 820

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OEM battery: Group U1Manufacturer fitment list
Case family: Group U112V starter case
Fits all years: 2025–2026same case every year on file

The Kawasaki Mule Pro-Fx 820 takes the Group U1 case. The Antigravity Group U1 RE-START is a drop-in for that case: 925 cranking amps, 8 lb, a built-in jump start that saves enough charge to get you home. U1 and U1R differ only in terminal position; match the layout of the battery you are replacing.

See the Antigravity Group U1

Fits your machine

925CA

Starter

Antigravity

Antigravity Group U1 12V UTV Battery 925CA (w/ Re-Start, Left Positive)

3-yr warranty · Free Shipping

Also fits your machine · 1 more

925CA

Starter

Antigravity

Antigravity Group U1R 12V UTV Battery 925CA (w/ Re-Start, Right Positive)

3-yr warranty · Free Shipping

Mule Pro-Fx 820 battery by model year

Model years	OEM battery	Where it comes from	Lithium that fits
2016–2023	OEM batteryGroup U112V starter case	Where it comes fromManufacturer fitment list	Lithium that fitsAntigravity Group U1 RE-START →Antigravity Group U1R RE-START →U1 and U1R differ only in terminal position; match the layout of the battery you are replacing.
2025–2026Your year · 2026	OEM batteryGroup U112V starter case	Where it comes fromManufacturer fitment list	Lithium that fitsAntigravity Group U1 RE-START →Antigravity Group U1R RE-START →U1 and U1R differ only in terminal position; match the layout of the battery you are replacing.

3 trims covered: Mule Pro-Fx 820, Mule Pro-Fx 820 EPS, Mule Pro-Fx 820 EPS LE.

Shop all Kawasaki UTV batteries

What the Mule Pro-Fx 820 needs, in plain English

Every Mule Pro-Fx 820 from the first 2016 model through 2026 starts on the Group U1 case, a 12-volt starter battery. Kawasaki 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 Group U1 RE-START: 925 cranking amps, 8 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. U1 and U1R differ only in terminal position; match the layout of the battery you are replacing. 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 a Kawasaki Mule Pro-Fx 820 take?+

The Group U1 case, the same one on every Mule Pro-Fx 820 from 2016 to 2026. The Antigravity Group U1 RE-START is the lithium drop-in for it. U1 and U1R differ only in terminal position; match the layout of the battery you are replacing.

Will a lithium battery work in a Mule Pro-Fx 820 without changes?+

Yes, on a machine 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 UTV batteries include, and match the terminal layout of the battery you are replacing.

Do I need a different charger for a lithium UTV 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.