About this replacement
Microsoft Surface Go — 7.6V Li-Polymer Replacement Battery (G16QA043H)
This 7.6V, 3100mAh lithium-polymer battery fits the Microsoft Surface Go tablet, covering models 1824, 4415Y, and Surface Go 10. It replaces part numbers G16QA043H and Q16QA043H directly. Capacity is rated at 23.56Wh, matching the original cell specification.
- Surface Go 1824 and 4415Y compatibility: Both variants share the same battery bay dimensions, connector pinout, and BMS communication protocol. The fuel gauge IC on each board talks to the same register set, so one cell covers both revisions without any firmware conflict.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Surface Go 1824 unit. The BMS accepted the new cell without fault flags, charge IC stepped through CC/CV phases cleanly, and the tablet exited low-battery lockout as expected.
- Fuel gauge recalibration after swap: After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The Surface Go's fuel gauge IC calibrates against the new cell during that first complete cycle, eliminating the inaccurate percentage readings that appear immediately after a battery swap.
Surface Go shutting down at 15–25% remaining after battery replacement
This is a voltage cliff issue, not a defective cell. Under combined display-backlight and Wi-Fi load, the battery terminal voltage drops sharply in the lower state-of-charge range. The fuel gauge IC, still calibrated to the old cell's discharge curve, triggers a low-voltage cutoff earlier than the actual remaining capacity warrants. Run one full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% — this writes a new discharge curve to the gauge and moves the cutoff point back to the correct voltage floor near 6.0V.
Fast charging unavailable after Surface Go battery swap
The Surface Go uses USB-PD for charging negotiation between the charger and the charge IC. On a freshly fitted cell, the charge controller may not immediately complete a successful PD handshake at higher wattage, so the tablet defaults to the standard 5V profile. Connect the original Microsoft charger and let the device complete one full charge cycle from below 20% to 100%. After that cycle the PD negotiation completes normally and the charge IC accepts the higher voltage rail on subsequent sessions.