About this replacement
HP ZBook Fury 15 G7/G8 — 15.44V Li-Polymer Replacement Battery (AL08XL)
This is a 15.44V, 5900mAh (91.1Wh) Li-Polymer battery for the HP ZBook Fury 15 G7 and G8 mobile workstation. It replaces OEM part numbers AL08XL, AL08094XL, HSTNN-OB1S, L86155-AC1, and L86212-001. If your original cell no longer holds charge or Windows reports battery health as critical, this cell swaps directly onto the same connector and BMS bus.
- ZBook Fury 15 G7 and G8 compatibility: Both generations share the same 15.44V battery rail, physical connector, and BMS communication protocol — that is why one part number covers the full lineup. The fuel gauge IC talks the same EEPROM-level handshake on both boards.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a ZBook Fury 15 G8. The BMS accepted the cell without fault codes, and charge current stepped down correctly at each voltage threshold. No capacity mismatch or thermal flag was logged.
- First-cycle calibration on ZBook Fury 15: After installing, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after installation on ZBook Fury 15
The ZBook Fury 15 BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported state. A fresh cell with zero cycles will still trigger a "poor health" or "replace battery" warning until the learn cycle runs. This is a firmware calibration gap, not a cell defect. Run one full discharge to hibernate cutoff, then charge to 100% without interruption — the BIOS resets the learned capacity register and the warning clears.
ZBook Fury 15 shutting down abruptly at 20–30% charge shown
Under full CPU and display load, the ZBook Fury 15 draws hard against the battery's voltage floor. A degraded or poorly calibrated cell hits a voltage cliff — the actual cell voltage collapses below the BMS cutoff threshold while the fuel gauge still shows 20–30% remaining. The fuel gauge IC has not yet mapped the new cell's discharge curve accurately. Run two or three complete discharge-to-hibernate and full-recharge cycles to let the gauge IC recalibrate; after that the reported percentage and actual cutoff voltage will align, and the unexpected shutdowns stop.