About this replacement
Microsoft Surface Book 3 13 Core i5-1035G7 — 7.58V Li-Polymer Replacement Battery (G3HTA052H)
This 7.58V, 6000mAh Li-Polymer battery fits the Microsoft Surface Book 3 13-inch with the Core i5-1035G7 processor. It also covers Surface Book 3 15, models 1872 and 1873. OEM part numbers G3HTA052H, DYNT02, G3HTA057H, and G3HTA058H all cross to this cell.
- Surface Book 3 clipboard battery compatibility: The Surface Book 3 splits power between the keyboard base and the detachable clipboard. This battery sits in the clipboard unit. The 7.58V rail and BMS handshake match what the clipboard's charge IC expects from those OEM part numbers.
- Bench tested on actual hardware: We cycled this battery through the Surface Book 3 clipboard's BMS. The charge IC accepted the cell without fault codes, balanced correctly across charge and discharge, and the protection circuit tripped at expected low-voltage cutoff.
- Post-swap calibration for the Surface Book 3: After fitting this battery, run the clipboard down to automatic shutoff under normal use — screen on, Wi-Fi active — then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell's actual capacity curve.
Why the Surface Book 3 clipboard shuts down at 15–20% remaining
The clipboard's fuel gauge IC builds its discharge map from the original cell's voltage curve. A new cell with a different internal resistance profile causes the IC to misread remaining capacity. Under combined display and Wi-Fi load, voltage sags faster than the gauge predicts, triggering the low-voltage cutoff before the reported percentage reaches zero. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets that map to the new cell.
Surface Book 3 showing wrong battery percentage after battery replacement
Windows reads battery percentage from the fuel gauge IC, which was calibrated to the worn original cell. After a swap, the IC has no accurate data on the new cell's capacity endpoints, so the reported percentage drifts — often reading full when it isn't, or dropping suddenly. This is not a faulty battery. Run one complete discharge to automatic shutoff, then charge without interruption to 100%. After that single cycle, the gauge IC locks onto the correct voltage-to-capacity relationship and percentage reporting stabilises.