About this replacement
Asus RC72LA-NH002W Series — 15.56V Li-Polymer Replacement Battery (0B200-04560000)
This 15.56V 5100mAh (79.36Wh) lithium-polymer battery fits the Asus RC72LA series, including the NH002W, NH007W, NH011W, and NH021W variants. It replaces OEM parts 0B200-04560000 and C41N2311. Install this when the original cell no longer holds a charge or the laptop has become tethered to the wall.
- RC72LA series compatibility: These models share the same four-cell Li-Polymer architecture, 15.56V rail, and BMS handshake protocol — the connector pinout and charge controller communication are identical across all NH variants listed.
- Bench tested on actual hardware: We cycled this cell through charge, discharge, and load-spike sequences. The BMS held cutoff at the correct low-voltage threshold and accepted a full CC/CV charge cycle without fault flags.
- Post-install calibration tip: After fitting this cell, run the laptop until Windows triggers hibernate at low battery, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the false "poor health" flag that appears after any cell swap.
BIOS reporting poor battery health immediately after fitting a new cell
The RC72LA's BIOS stores battery health data in EEPROM tied to the original cell's charge history. When a new cell is installed, that stored data no longer matches the actual cell state, so the firmware flags it as degraded. This is a data mismatch, not a fault with the replacement. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% to trigger the BIOS learn cycle. After one or two cycles, the health readout will recalibrate to the new cell.
Laptop shutting down abruptly while the OS still shows 20–25% remaining
This happens when the fuel gauge IC is still calibrated to the old, degraded cell's discharge curve. Under combined CPU and display load, the new cell's voltage drops faster than the IC expects, hitting the BMS cutoff before the percentage reaches zero. It is not a fault in the replacement — the IC simply needs recalibration cycles. Discharge fully to hibernate cutoff twice in a row with normal use, charging to 100% each time, and the shutdowns will stop as the fuel gauge resets its endpoint to 3.0V per cell.