Asus ROG Flow X16 Compatible Battery C41N2109 15.52V 5800mAh

Asus ROG Flow X16 GV601RE-M5057X — 15.52V Li-Polymer Replacement Battery (C41N2109)

This is a Li-Polymer replacement battery for the Asus ROG Flow X16 series, including the GV601RE-M5057X, GV601RW-M5110X, NR2203RM, and NR2203RW. It runs at 15.52V and delivers 5800mAh (90.02Wh). It replaces OEM part numbers C41N2109 and 0B200-04200000.

• ROG Flow X16 GV601 series compatibility: These models share the same 4-cell 15.52V architecture, identical connector pinout, and the same BMS handshake protocol — the battery management system on each board expects the same EEPROM signature that this cell carries.
• Bench tested on actual hardware: We cycled this cell on a GV601RE board under sustained CPU and GPU load. The BMS accepted the EEPROM handshake without fault codes, and charge termination triggered correctly at full capacity with no overcharge events logged.
• Post-install calibration on the ROG Flow X16: After fitting this battery, run one full discharge to hibernate-cutoff under active load — gaming or a render task works well — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning the EC logs after any cell swap.

Why the ROG Flow X16 shuts down at 20–30% shown after a battery swap

Under full CPU and discrete GPU load, the ROG Flow X16 draws sharp current spikes that a degraded or poorly calibrated cell cannot sustain. Voltage sags below the EC's cutoff threshold before the fuel gauge reaches zero — so the OS shows 20–30% remaining when the board has already tripped a low-voltage shutoff. This is a voltage cliff, not a capacity problem. Run two full calibration cycles (discharge to hibernate, charge to 100% uninterrupted) and the fuel gauge IC will recalibrate its state-of-charge model against the new cell's actual voltage curve.

BIOS reporting battery health as poor immediately after fitting a new cell

The Asus EC reads health data from EEPROM registers in the battery — not from live voltage measurement. When a new cell is installed, those registers are either blank or pre-loaded with factory defaults that don't match the board's learned history, so the EC flags the battery as degraded. This is not a fault with the replacement cell. Boot into MyASUS or open Battery Health Charging in the BIOS, clear any stored cycle data, then complete one full discharge-to-hibernate and uninterrupted charge-to-100% cycle. After that cycle, the BIOS health reading should return to normal.