SG03XL HP Envy M7U Compatible Battery 11.55V 5200mAh

HP Envy M7U Series — 11.55V Li-ion Replacement Battery (SG03XL)

This is a 11.55V, 5200mAh (60.06Wh) Li-ion battery for the HP Envy M7U and M7-U009DX laptops, along with the Envy 17-U294CL, 17-U275CL, and related 17-U series models. It matches the SG03XL cell spec and uses the same connector and BMS handshake as the original. Cross-referenced OEM part numbers include HSTNN-LB7E, HSTNN-LB7F, 849048-421, and TPN-I126.

• Envy M7U and 17-U series fit: These models share the same 11.55V three-cell architecture, identical dock connector, and the same BMS communication protocol — so one cell covers the full range without firmware conflicts or connector adapters.
• Bench tested on actual hardware: We ran the SG03XL-spec cell through charge and discharge cycles on an Envy 17-U unit. The BMS authenticated cleanly, charge terminated correctly at full capacity, and no fault codes appeared in HP Support Assistant.
• First-cycle calibration on the Envy M7U: After fitting, let the battery discharge fully until the laptop hibernates, then charge it in one uninterrupted run to 100%. This resets the BIOS battery learn cycle and clears the inaccurate "poor health" warning that appears routinely after any cell swap on these HP models.

Why the Envy M7U BIOS reports poor health immediately after a battery swap

The HP BIOS reads EEPROM data written by the original cell and compares it against charge history. A new cell has no matching history, so the firmware flags it as degraded — even at full capacity. This is not a fault with the replacement. Running one complete discharge-to-hibernate followed by an uninterrupted charge to 100% gives the BIOS enough cycle data to re-evaluate and update the health status. After two or three full cycles, HP Support Assistant and Windows battery reporting both settle into accurate readings.

Envy M7U shutting down at 20–30% remaining shown on screen

This happens when the fuel gauge IC loses calibration against the new cell's actual voltage curve. The gauge reads 25% remaining while the cell voltage has already dropped below what the CPU and display draw requires under load — the system cuts out before the reported percentage reaches zero. It is not a faulty battery. Force a full discharge to hibernate-cutoff, then charge uninterrupted to 100% twice in a row. After those two calibration cycles, the fuel gauge re-maps to the new cell and the shutdown-at-20% behaviour stops.