Logitech G Pro X Superlight 2 Compatible Battery 3.8V 290mAh

Logitech G Pro X Superlight 2 Gaming Mouse — 3.8V Li-Polymer Replacement Battery (533-000228)

This is a 3.8V, 290mAh lithium-polymer replacement battery for the Logitech G Pro X Superlight 2 wireless gaming mouse. It replaces OEM part number 533-000228 directly. When the original cell degrades and the mouse can no longer hold a charge through a session, this battery restores full wireless operation.

• G Pro X Superlight 2 fit: The Superlight 2 runs a single-cell Li-Polymer pack at 3.8V nominal — a tighter voltage rail than older Logitech wireless mice. The BMS inside the mouse checks cell voltage on startup, so the replacement cell must sit within the original voltage window or the mouse refuses to power on.
• Bench tested on actual hardware: We connected this cell to the Superlight 2 charge and discharge circuit. The BMS accepted the cell without fault flags, charge termination fired at the correct cutoff, and the mouse paired normally over the LIGHTSPEED receiver.
• Li-Polymer swelling watch: The Superlight 2 shell is extremely thin — clearance around the battery is minimal. If the original cell has swollen at all, do not force the new cell in. A swollen cell means the old one needs careful extraction before fitting the replacement.

Why the G Pro X Superlight 2 won't power on after a battery swap

The Superlight 2 BMS runs a startup voltage check before enabling the power rail to the sensor and wireless module. If the replacement cell ships at storage voltage — typically around 3.6V — and the BMS threshold sits above that, the mouse stays dark. Connecting the mouse to USB for 10–15 minutes before pressing the power button allows the charging circuit to raise cell voltage into the acceptable window. If the mouse still doesn't respond, check that the battery connector is fully seated — the flat FPC connector on this mouse can appear locked without actually making contact.

Pointer stuttering or lag appearing before the low-battery light triggers

The LIGHTSPEED wireless module in the Superlight 2 begins reducing its transmission power as cell voltage drops toward 3.5V — this happens before the LED low-battery indicator fires. The result is intermittent pointer lag or micro-stutters that look like a tracking issue but are actually a voltage issue. Replug the USB receiver into a different port to rule out USB interference, then check battery voltage. If the cell reads below 3.5V under load, replacement is the fix, not a driver or surface change.