About this replacement
HP Envy x360 M6-W Series — 11.4V Li-ion Replacement Battery (LE03XL)
This is an 11.4V, 4000mAh (45.6Wh) Li-ion replacement battery for the HP Envy x360 M6-W convertible laptop. It also fits the Pavilion x360 13-S000 and 13-S100 series. OEM cross-references include LE03XL, HSTNN-UB6O, TPN-W113, and TPN-W114.
- Envy x360 and Pavilion x360 compatibility: These models share the same 11.4V three-cell architecture, connector pinout, and BMS handshake protocol — the LE03XL fits across the range without modification or adapter.
- Bench tested on actual hardware: We ran this cell on the M6-W platform and confirmed the BMS handshake completes correctly, charge negotiation starts within seconds of connection, and the fuel gauge IC reads the cell without error flags.
- Post-installation discharge cycle: After fitting this battery, 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 often appears after a cell swap on HP laptops.
Why the Envy x360 reports poor battery health after a cell swap
HP's BIOS stores charge history and health data from the original cell in its EEPROM. When a new cell installs, the BIOS compares it against that stored profile and flags a mismatch as degraded health. This is not a fault with the replacement cell. Running the full discharge-to-hibernate then uninterrupted full-charge cycle forces the BIOS to rewrite its battery learn data against the new cell's actual characteristics. After one or two cycles, the health status clears to normal.
Laptop shuts down at 20–30% remaining after battery swap
This happens when the fuel gauge IC's calibration is still mapped to the old cell's voltage curve. The IC sees the new cell's voltage drop under combined CPU and display load and interprets it as critically low, triggering shutdown before the cell is actually depleted. It is not a defective battery. Run two to three full discharge and charge cycles — the gauge IC recalibrates against the new cell's voltage profile, and the cutoff point shifts back to the correct level near 0%.