HP Elite x2 G1 OL02XL Replacement Battery 7.4V 4450mAh

HP Elite x2 1011 G1 — 7.4V Li-Polymer Replacement Battery (OL02XL)

This is a 7.4V, 4450mAh Li-Polymer cell that replaces the OL02XL battery in the HP Elite x2 G1 and Elite x2 1011 G1 2-in-1 tablet-laptop. It fits the detachable tablet section of the hybrid, restoring unplugged operation when the original cell has degraded. Confirmed fitment includes L8L94PA, L4H91AW, and units carrying OEM part numbers HSTNN-DB5Z, 750549-001, 750549-005, and 750549-006.

• Elite x2 G1 tablet unit compatibility: These models share the same 7.4V power rail, flat Li-Polymer form factor, and BMS handshake protocol. The connector pinout and cell dimensions (266.90 × 79.25 × 4.20mm) are identical across the Elite x2 G1 family, so the same cell fits all listed variants.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an Elite x2 1011 G1 unit. The BMS accepted the cell without fault codes, charge current ramped normally through CC/CV stages, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• BIOS learn cycle after install: After fitting this cell, 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 appears after every cell swap on this platform.

BIOS reporting battery health as poor after swapping the OL02XL cell

The Elite x2 G1 BIOS reads health data stored in the old cell's EEPROM. When a new cell is installed, the EEPROM contains no charge history, so the BIOS flags it as unknown or degraded. This is a calibration gap, not a fault with the replacement cell. Run one full discharge cycle to hibernate-cutoff followed by an uninterrupted charge to 100%, and the BIOS battery learn routine will write fresh baseline data to the cell's EEPROM, clearing the warning.

Elite x2 G1 shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC is still calibrated to the old cell's voltage curve. Under combined CPU and display load, the new cell hits a voltage cliff that the uncalibrated gauge misreads as 20–30% remaining. The system interprets the sudden voltage drop as a critical low and triggers an immediate shutdown. Complete two to three full discharge-to-hibernate then full-charge cycles — by the third cycle the fuel gauge IC recalibrates to the new cell and the shutdowns stop.