Asus RC71L-NH001W Replacement Battery 15.48V 5150mAh

Asus RC71L-NH001W Series — 15.48V Li-Polymer Replacement Battery (C41N2208)

This is a 15.48V 5150mAh (79.72Wh) Li-Polymer battery for the Asus RC71L-NH001W, RC71L-NH002W, RC71L-NH019W, RC71L-NR2301L, and related models. It replaces OEM part C41N2208 directly. Use this when the original cell no longer holds a charge or fails to register in Windows or the BIOS.

• RC71L series compatibility: These RC71L variants share the same 15.48V four-cell Li-Polymer architecture, the same connector pinout, and the same BMS communication protocol — so one SKU covers the full lineup without modification.
• Bench tested on actual hardware: We cycled this cell through charge, partial discharge, and full discharge on the RC71L platform. The BMS handshake completed correctly, charge current stepped down at 80% and 95% as expected, and the protection circuit tripped cleanly at low-voltage cutoff.
• First-cycle calibration on RC71L: After fitting this cell, run one full discharge until the laptop hibernates at cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health or capacity warning that appears after every cell swap on this platform.

BIOS reporting poor battery health immediately after fitting the C41N2208

The RC71L stores cycle count, wear level, and rated capacity in EEPROM on the battery's embedded controller. When a new cell is installed, that EEPROM data doesn't match the BIOS's last recorded values, so the system flags the battery as degraded before a single charge completes. This is a data mismatch — not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%, and the BIOS will rewrite its battery health baseline against the new cell's actual readings.

RC71L shutting down between 20–30% charge shown on screen

The Windows fuel gauge IC calibrates against the old cell's discharge curve, not the new one. Under combined CPU and display load, the new cell's actual voltage drops faster than the gauge predicts — the system hits the low-voltage protection threshold while the percentage readout still shows 20–25%. The fix is two to three full discharge-and-recharge cycles so the fuel gauge IC can map the real discharge curve of the replacement cell. After calibration, the gauge should track closely and the laptop should not cut out above 5% remaining.