About this replacement
HP Pavilion 14-AL000 Series — 11.55V Li-ion Replacement Battery (SE03XL)
This is an 11.55V, 3500mAh (40.43Wh) Li-ion replacement battery for the HP Pavilion 14-AL000 series laptop. It fits the Pavilion 14-AL000 and over 230 related 14-inch Pavilion models including the AL001ng, AL003ng, and AL004ng. OEM cross-references include SE03XL, HSTNN-LB7G, HSTNN-UB6Z, and TPN-Q171.
- Pavilion 14-AL series compatibility: These models share the same three-cell 11.55V battery architecture, identical connector pinout, and the same BMS handshake protocol — which is why one battery covers the full AL000 range despite minor regional hardware variations.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Pavilion 14-AL unit. The BMS completed full charge termination cleanly, voltage held stable across the draw curve, and the BIOS battery status reported without fault flags after the initial learn cycle.
- Post-install calibration on the Pavilion 14-AL: After fitting this cell, run the laptop down to automatic hibernate under normal use — do not force shutdown — then charge it uninterrupted to 100%. This completes 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 immediately after fitting the SE03XL
The Pavilion 14-AL stores learned capacity data in BIOS-managed EEPROM tied to the old cell. When a new cell goes in, that stored data no longer matches the actual charge curve, so the BIOS flags the battery as degraded or unknown. This is a firmware calibration state, not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite its learned values against the new cell. After two or three cycles the health status will update correctly.
Laptop shuts down at 20–30% charge shown on the Pavilion 14-AL
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The OS reads a voltage level that looks like 20–30% remaining, but the cell hits its minimum voltage cliff under combined CPU and display load before the gauge catches up. The fix is the same calibration cycle — discharge fully to hibernate cutoff, then charge uninterrupted to 100%. After two full cycles, the fuel gauge IC realigns its reference points and the shutdowns stop. If the problem persists past three cycles, check BIOS battery health at startup — the cutoff voltage floor should sit at 10.8V minimum.