About this replacement
HP Envy 14 Series — 10.8V Li-ion Replacement Battery (HSTNN-LB4N)
This 10.8V, 4400mAh (47.52Wh) Li-ion battery replaces the original cell in the HP Envy 14, Envy 14t, Envy 14z, and Envy 14 Touch series notebooks. It matches the OEM voltage rail and connector pinout for the HSTNN-LB4N, PI06, TPN-Q117, TPN-Q119, TPN-Q120, and TPN-Q121 part numbers. Install it when the original cell no longer holds adequate charge or fails to charge at all.
- Envy 14 platform compatibility: The Envy 14, 14t, 14z, and 14 Touch share the same 10.8V three-cell architecture and identical six-pin smart connector. The BMS handshake protocol is consistent across these variants, so one cell covers the full range without firmware conflict.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an Envy 14 Touch unit. The BMS initialised correctly on first connection, charge acceptance registered immediately, and the protection circuit tripped at the expected low-voltage cutoff threshold without anomaly.
- Post-install calibration on Envy 14: After fitting this cell, run the laptop down to hibernate cutoff under normal use — do not force-shutdown — 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 Envy 14 hardware.
BIOS reporting poor battery health immediately after fitting a new cell
The HP Envy 14 BIOS reads health data from EEPROM registers stored on the battery's fuel gauge IC — not from the cell chemistry directly. When a new cell installs, those registers still reflect the degraded state of the old battery. The BIOS flags "poor health" or "consider replacing" because it hasn't yet run a full learn cycle against the new cell's actual capacity curve. One complete discharge-to-hibernate followed by a full uninterrupted charge resets the register values and clears the warning.
Laptop shutting down at 20–30% charge shown on screen
This is a voltage cliff issue, not a calibration problem. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC predicts — the BMS hits the low-voltage cutoff threshold while the OS gauge still shows 20–30% remaining. It happens most often in the first few cycles before the fuel gauge IC has mapped the new cell's discharge curve. Run two to three full discharge-and-charge cycles; the IC recalibrates its voltage-to-percentage mapping and the early shutdowns stop. If the problem persists past five cycles, check that the battery resting voltage reads at least 10.8V on a multimeter before load is applied.