Microsoft Surface Book 2 15 G3HTA041 Replacement Battery 11.36V

Microsoft Surface Book 2 1793 15-inch — 11.36V Li-Polymer Replacement Battery (G3HTA041)

This is an 11.36V, 5400mAh (61.34Wh) Li-Polymer replacement battery for the Microsoft Surface Book 2 15-inch, model 1793. It fits the clipboard section of the detachable 2-in-1 and restores charge capacity lost through cell degradation over time. OEM part number G3HTA041 confirms fitment to this specific chassis.

• Surface Book 2 15-inch clipboard section: The 1793 clipboard battery sits in the display half of the detachable unit, separate from the keyboard base battery. This replacement targets that upper cell only. Voltage rail, connector, and BMS handshake all match the 1793 clipboard module — the keyboard base battery is a different part entirely.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 1793 clipboard unit. The BMS accepted charge negotiation from the first cycle, reported state-of-charge correctly to Windows after one full recalibration cycle, and held voltage stable under display-plus-WiFi load without tripping cutoff.
• Fuel gauge recalibration after swap: After installation, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The fuel gauge IC calibrated against the old cell will show inaccurate percentages until this cycle resets it against the new cell's actual capacity curve.

Surface Book 2 clipboard battery vs keyboard base battery — knowing which one failed

The Surface Book 2 15-inch uses two separate batteries: one in the clipboard (display half) and one in the keyboard base. Windows reports them as separate entries under Device Manager and in the Surface app. If the clipboard drains fast but the base holds charge, the G3HTA041 is the correct part. If both sections show degradation, the base battery is a separate replacement job with a different part number.

Surface Book 2 shutting down at 15–25% battery remaining

This happens when the clipboard cell voltage drops sharply under combined display and wireless load — the BMS sees the voltage cliff and cuts power before the OS percentage reaches zero. A degraded or new uncalibrated cell is the most common cause. After installing this replacement, run one full discharge to auto-shutoff so the BMS maps the actual low-voltage threshold of the new cell. After that recalibration cycle, the reported percentage at shutoff should align with real cell depletion at or below 5%.