SA04XL HP Envy X360 15-DS0002NC Replacement Battery 15.2V

HP Envy X360 15-DS0002NC — 15.2V Li-ion Replacement Battery (SA04XL)

This is a 15.2V, 3350mAh (50.92Wh) Li-ion replacement battery for the HP Envy X360 15-DS0002NC and its 2-in-1 siblings. It replaces OEM part numbers SA04XL, HSTNN-OB1F, HSTNN-UB7U, L43248-541, and related variants. Fit covers the Envy X360 15-DS and 15-DR series convertible notebooks.

• 15-DS and 15-DR series compatibility: Both sublines share the same 15.2V four-cell architecture, connector pinout, and BMS handshake protocol — that is why one battery pack covers both chassis revisions without modification.
• Bench tested on actual hardware: We ran this cell on a 15-DS0002NC and confirmed the BMS initialised correctly, charge acceptance reached full capacity, and the EC reported accurate voltage and current across the full charge curve.
• Post-install recalibration cycle: After fitting, run the laptop down to hibernate-cutoff on battery only, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that almost always appears after any cell swap on this platform.

BIOS reporting poor battery health immediately after installation

HP's embedded controller reads EEPROM data written by the original cell during manufacture. When a new cell goes in, that EEPROM signature does not match the EC's stored learn data, so the system flags health as poor or unknown before any real-world cycles have occurred. This is a firmware state, not a battery fault. One full discharge-to-hibernate followed by an uninterrupted charge to 100% allows the EC to write a new baseline. After that cycle, health status typically corrects itself.

Laptop shutting down at 20–30% shown on the fuel gauge

The fuel gauge IC on the 15-DS platform maps state-of-charge using voltage curves calibrated to the original cell's chemistry. A new cell with slightly different internal resistance produces a voltage cliff the uncalibrated gauge misreads as a higher remaining charge than actually exists. Under combined CPU and display load, the cell voltage drops below the EC's cutoff threshold before the gauge hits zero. Run two full discharge-to-hibernate and full charge cycles — this gives the fuel gauge IC enough data points to recalibrate its discharge curve to 15.2V nominal chemistry.