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LithiumBatteryz

KTM SX-E Battery

2020–2026. The OEM battery case the SX-E 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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Year
Make
Model
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Your ride

2026 KTM SX-E

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OEM battery
ATZ5-XManufacturer fitment list
Case family
ATZ5-X12V starter case
This battery fits
2023–2026other years take a different case

The KTM SX-E takes the ATZ5-X case. The Antigravity ATZ5-X is a drop-in for that case: 170 cranking amps, 1 lb.

See the Antigravity ATZ5-X
Fits your bike
170CA
Antigravity ATZ5-X 12V Dirt Bike Battery 170CAStarter
Antigravity

Antigravity ATZ5-X 12V Dirt Bike Battery 170CA

12V·170CA·1 lb
$120
$160Save $40
3-yr warranty · Ships in 3-5 days

SX-E battery by model year

2020–2022OEM batteryATZ5-X12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATZ-7 RE-START →Antigravity ATZ5-X →
2023–2026Your year · 2026OEM batteryATZ5-X12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATZ5-X →

3 trims covered: SX-E 2, SX-E 3, SX-E 5.

Shop all KTM Dirt Bike batteries

What the SX-E needs, in plain English

Every SX-E from the first 2020 model through 2026 starts on the ATZ5-X case, a 12-volt starter battery. KTM 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 ATZ5-X: 170 cranking amps, 1 pound, 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 a KTM SX-E take?+
The ATZ5-X case, the same one on every SX-E from 2020 to 2026. The Antigravity ATZ5-X is the lithium drop-in for it.
Will a lithium battery work in an SX-E without changes?+
Yes, on a bike 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. Bikes older than about 2000 should have their voltage regulator and rectifier checked first, since a failing one overcharges any battery and lithium tolerates it less. Fill any gap in the tray with the foam spacers most lithium dirt bike batteries include.
Do I need a different charger for a lithium dirt bike 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.