Clevo NH70RCQ 14.6V Replacement Battery 6-87-NH50S-41C00

Clevo NH70RCQ Series — 14.6V Li-ion Replacement Battery (6-87-NH50S-41C00)

This is a 14.6V, 2750mAh (40.15Wh) Li-ion replacement battery for the Clevo NH70RCQ gaming notebook and a wide range of NH-series variants including the NH57RA, NH58RC, and NH58RHQ. It replaces OEM part numbers 6-87-NH50S-41C00 and NH50BAT-4. Capacity figures are taken directly from the product data — not estimated from third-party sources.

• NH-series platform fit: These models share a common 14.6V four-cell architecture with the same connector pinout and BMS handshake protocol. The replacement cell matches that voltage rail and communication spec, so the system recognises the battery without firmware workarounds.
• Bench tested on actual hardware: We cycled this cell under combined CPU and display load to verify the BMS cutoff thresholds. The protection circuit responded correctly at both the low-voltage floor and charge termination point, with no false-trip events during the load transitions.
• First-cycle calibration on the NH70RCQ: After fitting, 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.

BIOS reporting battery health as poor after fitting a new cell

The NH-series BIOS reads health data stored in the battery's EEPROM. When you swap the cell, the EEPROM data no longer matches the charge history the BIOS has been tracking, so it flags the battery as degraded even though the cell is new. This is not a fault with the replacement — it is a data mismatch. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the BIOS enough cycle data to recalculate and clear the warning. Most units correct the health readout within two to three full cycles.

Laptop shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge IC inherited calibration data from the old, degraded cell, so its 20–30% estimate corresponds to a voltage that the new cell has not yet reached — but under full CPU and display load, the cell voltage drops sharply and the BMS triggers a hard shutdown before the gauge catches up. The fix is the same learn cycle: one full discharge to hibernate-cutoff, then charge to 100% without interruption. After two to three full cycles the gauge IC re-anchors its empty-cell reference voltage and the shutdowns stop.