HP Business Notebook NX4300 Compatible Battery 11.1V 4400mAh

HP Business Notebook NX4300 — 11.1V Li-ion Replacement Battery (397164-001)

This is an 11.1V, 4400mAh (48.84Wh) lithium-ion battery for the HP Business Notebook NX4300. It replaces OEM part numbers 397164-001, HSTNN-A14C, W22044LB, and EH510AA. If your original battery no longer holds charge or the laptop only runs on AC power, this cell restores portable operation.

• NX4300 fit confirmation: The NX4300 uses an 11.1V three-cell-series Li-ion pack with a specific connector pinout and BMS handshake. This cell matches that configuration. The BIOS will read voltage, state-of-charge, and temperature data through the SMBus interface without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the NX4300 platform. The BMS reported cell voltage within normal range across all states, and the laptop accepted a full charge without throwing a hardware fault or unknown battery warning.
• First-cycle reset after install: After fitting this cell, run the laptop down to hibernate cutoff on battery only — no AC. Then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to recalibrate against the new cell's chemistry and clears the inaccurate health warning that appears after every cell swap.

Why the NX4300 BIOS flags a new battery as poor health

The NX4300 BIOS reads health data stored in the battery's EEPROM, not just live cell voltage. When a replacement cell arrives, its EEPROM reflects factory default values that don't match the laptop's learned charge history. The BIOS interprets that mismatch as degradation. One full discharge-to-hibernate followed by an uninterrupted charge rewrites that learned data and resolves the warning.

NX4300 shutting down at 20–30% charge remaining

This happens when the fuel gauge IC hasn't yet calibrated against the new cell's actual voltage curve. Under combined CPU and display load, voltage drops faster than the uncalibrated gauge predicts — the laptop hits its low-voltage cutoff while the OS still shows 20–30% remaining. Run two to three full discharge-and-charge cycles without interruption. After calibration, the gauge tracks the cell's real voltage and the early shutdowns stop. If the issue persists after three cycles, check the BIOS for a battery charge limit setting — some NX4300 firmware builds cap charge at 11.0V rather than the full 12.6V endpoint.