System76 Galago Pro 3 Compatible Battery 11.4V 2600mAh

Tuxedo System76 Galago Pro 3 — 11.4V Li-Polymer Replacement Battery

This 11.4V, 2600mAh (29.64Wh) lithium-polymer battery replaces the original cell in the System76 Galago Pro 3 ultrabook and compatible InfinityBook Pro 13 and Pro 14 models. It restores unplugged operation to the laptop after the original cell has degraded or failed. Voltage, connector pitch, and physical dimensions match the factory specification at 181.40 x 85.55 x 10.10mm.

• Galago Pro 3 and InfinityBook Pro platform fit: These models share a common chassis and battery bay spec across the Clevo-based ultrabook platform. Same 11.4V three-cell configuration, same connector orientation, and same BMS communication protocol — so one cell fits the full listed range without modification.
• Bench tested on actual hardware: We ran this cell through charge, discharge, and BMS handshake on a Galago Pro 3 unit. The BMS recognised the cell correctly, charge current stepped down at the expected voltage threshold, and no protection trip occurred during load cycling.
• Post-install learn cycle on Galago Pro 3: After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

BIOS reporting poor battery health immediately after replacement

The Galago Pro 3 BIOS reads health data from EEPROM on the battery's embedded controller. When a new cell is installed, that EEPROM still holds cycle count and capacity data from the old cell — or defaults to zero, which the BIOS flags as a fault. This is not a defect in the replacement cell. Running one full discharge-to-hibernate then a full uninterrupted charge gives the BIOS enough data to overwrite the stale EEPROM values. After one or two cycles, the health indicator returns to normal.

Laptop shuts down at 20–30% charge shown after battery swap

This happens because the fuel gauge IC calibrates against the old cell's discharge curve. After a swap, it does not yet know where the new cell's voltage cliff sits under combined CPU and display load. The cell hits its low-voltage cutoff before the gauge reaches 0%, so the system cuts power while the display still shows remaining charge. The fix is to run two or three full discharge cycles through hibernate — each cycle tightens the fuel gauge IC's model of the new cell. After three cycles, shutdown typically aligns within 5% of the displayed reading.