About this replacement
Asus ProArt StudioBook Pro X / StudioBook 17 W730G2T — 15.32V Li-ion Replacement Battery (C41N1838)
This is a 15.32V, 4000mAh (61.28Wh) Li-ion replacement battery for the Asus ProArt StudioBook Pro X and StudioBook 17 W730G2T. Both are mobile workstations that draw sustained high loads from CPU, GPU, and display simultaneously. The C41N1838 part number maps directly to these two models and no others in the StudioBook line.
- StudioBook Pro X and W730G2T shared platform: Both models run the same 15.32V four-cell configuration with an identical BMS connector and handshake protocol. The shared voltage rail and BMS communication spec mean one part number covers both chassis without modification.
- Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on the StudioBook platform. The BMS accepted the new cell, completed the charge handshake, and held voltage within spec under sustained GPU and CPU load.
- Post-install calibration on the StudioBook: After fitting this cell, 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 appears after every cell swap on this platform.
Why the StudioBook shuts down at 20–30% after a battery swap
The BIOS fuel gauge IC builds a discharge curve against the original cell over time. When a new cell goes in, that stored curve no longer matches the actual chemistry. The gauge reads 20–30% remaining, but the cell voltage has already dropped below the minimum load threshold — so the system cuts power to protect the hardware. Running two or three full discharge-to-hibernate and charge-to-100% cycles forces the fuel gauge IC to rebuild the curve against the new cell and the shutdowns stop.
BIOS reporting battery health as poor immediately after replacement
This happens because the BIOS reads health data from EEPROM registers written by the original cell's embedded controller. A fresh cell arrives with its own factory EEPROM values, which the BIOS interprets as a mismatch or degraded state. It is not a fault with the replacement cell. After one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%, the BIOS rewrites its battery learn data and the health warning clears.