About this replacement
Asus ROG G501VW-BSI7N25 — 15.2V Li-Polymer Replacement Battery (C41N1524)
This is a 15.2V, 3950mAh (60.04Wh) Li-Polymer battery for the Asus ROG G501VW-BSI7N25 and related UX501VW and G501VW variants. It replaces OEM part numbers C41N1524 and 0B200-01250200. The pack slots into the same bay and connects to the same BMS handshake points as the original cell.
- G501VW and UX501VW series fit: These models share the same 15.2V four-cell Li-Polymer configuration, connector pinout, and BMS communication protocol — which is why one pack covers the full lineup without modification.
- Bench tested on actual hardware: We ran this cell through charge, discharge, and BMS handshake verification on a G501VW unit. The BMS accepted the pack, charge current ramped correctly through CC/CV stages, and no fault codes triggered at either end of the cycle.
- Post-install calibration cycle: After fitting this battery, run a 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.
BIOS reporting poor battery health immediately after fitting a new cell
The G501VW BIOS reads health data from EEPROM stored on the battery pack itself, not from live cell voltage. When you install a replacement, the EEPROM data is either blank or carries a different cycle count than the system expects. The BIOS interprets this mismatch as a degraded pack and flags it accordingly. Running one full learn cycle — discharge to hibernate, then a full uninterrupted charge — writes fresh calibration data and clears the warning.
Laptop shutting down at 20–30% remaining on the gauge
This happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve. The old calibration map doesn't match the new pack, so the gauge hits a cliff and the system shuts down before the real capacity is exhausted. It is not a fault with the replacement battery. Do two full discharge-to-hibernate and charge-to-100% cycles — by the second cycle the gauge IC recalibrates and the reported percentage tracks actual cell voltage correctly.