About this replacement
HP Pavilion 15-ab / 17-g Series — 14.8V Li-ion Replacement Battery (KI04)
This is a 14.8V, 2200mAh (32.56Wh) Li-ion replacement battery for the HP Pavilion 15-ab and Pavilion 17-g laptop series. It also covers the extended Pavilion 15-ab038TX, 15-ab024NE, and over 230 additional Pavilion variants sharing the same connector and BMS protocol. Cross-references include HSTNN-LB6S, HSTNN-DB6T, TPN-Q158 through TPN-Q163, and 800049-001 among others.
- Pavilion 15-ab and 17-g battery platform: These two series share a 14.8V four-cell Li-ion architecture with an identical connector pinout and BMS handshake. HP standardised the KI04 part number across all of them, so one cell works across the full range without any firmware workaround.
- Bench tested on actual hardware: We ran this cell on a Pavilion 15-ab unit and confirmed the BMS initialised cleanly on first boot. The charge controller accepted the cell immediately, and the BIOS battery health register updated after one completed learn cycle.
- BIOS learn cycle after installation: After fitting this battery, run the laptop from 100% down to hibernate cutoff, then charge uninterrupted to 100% before using it again. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on the Pavilion platform.
Pavilion 15-ab shutting down at 20–30% remaining after a battery swap
This is a voltage cliff problem, not a capacity problem. Under full CPU and display load, the new cell's voltage drops faster than the old EEPROM data predicts, and the system cuts power before the fuel gauge reads zero. The BMS is acting on stale calibration data from the previous cell. Run two full discharge-to-hibernate and uninterrupted charge cycles, and the fuel gauge IC recalibrates against the new cell's actual voltage curve.
Windows reporting the wrong Wh rating in battery settings after fitting this cell
The Wh figure Windows displays is pulled from the EEPROM on the battery PCB, not measured live from the cells. A new replacement cell carries its own EEPROM data, which may differ slightly from what the original unit reported. This is an EEPROM rated value versus actual chemistry difference — the cell is correct. After two full learn cycles, the Design Capacity field in Windows Battery Report should align to 32.56Wh.