About this replacement
Asus ROG Flow X13 GV301QH-K6028T — 15.48V Li-Polymer Replacement Battery (C41N2009)
This is a 15.48V, 3950mAh (61.15Wh) Li-Polymer battery for the Asus ROG Flow X13 series. It fits GV301QH, GV301QC, GV301QE, and GV301QU variants — all share the same 4-cell Li-Polymer pack identified by OEM part number C41N2009 (also listed as 0B200-03850000). The ROG Flow X13 is a 13.4-inch gaming ultrabook, so this cell runs under both sustained CPU load and display-intensive gaming workloads.
- GV301 series compatibility: All GV301 variants use the same 15.48V voltage rail and the same 4-cell flat-pack form factor. The BMS connector pinout and physical dimensions (260.30 × 108.60 × 5.60mm) match across the entire GV301 lineup, so one part number covers all 70+ models in this series.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a GV301 board. The BMS negotiated charge termination correctly, balancing cells without error flags. Under combined CPU and GPU load, voltage held stable and no protection cutoff was triggered.
- Post-install recalibration on the ROG Flow X13: After fitting, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that almost always appears after a cell swap on this platform.
BIOS reporting poor battery health immediately after replacement
The ROG Flow X13 BIOS reads health data stored in the cell's EEPROM. When a new cell goes in, the EEPROM data does not match the charge history the BIOS expected from the old pack. The system flags this as degraded health — not because the cell is faulty, but because the learn cycle has not run yet. Complete one full discharge-to-hibernate followed by an uninterrupted charge to 100% and the BIOS will rewrite its health baseline against the new cell's actual data.
Laptop shuts down at 20–30% remaining after battery swap
This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell reaches a voltage cliff under combined CPU and display load before the OS gauge reaches 0%, so the system cuts power while showing charge remaining. The fuel gauge needs two to three full calibration cycles — full discharge to hibernate, full recharge to 100% — to map the new cell's curve accurately. After three cycles, the shutdown threshold should align with the displayed percentage.