About this replacement
HP EliteBook Folio 9470m / 9480m — 14.8V Li-Polymer Replacement Battery (HSTNN-IB3Z / BT04XL)
This 14.8V, 3500mAh (51.8Wh) Li-Polymer cell replaces the original battery in the HP EliteBook Folio 9470m and 9480m ultrabooks. It also covers the broader BT04XL and BT06XL battery families across multiple EliteBook Folio variants. OEM part numbers include HSTNN-IB3Z, 687517-171, 687945-001, and 696621-001, among others listed above.
- EliteBook Folio 9470m and 9480m compatibility: Both models run the same 14.8V battery rail with identical connector pinout and BMS handshake protocol. HP used the BT04XL and BT06XL part numbers interchangeably across these chassis generations, so one cell covers both without any hardware modification.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an EliteBook Folio 9470m. The BMS communicated correctly with the HP EC firmware, charge termination triggered at the expected voltage, and no protection faults were logged during load testing.
- Post-install calibration on the 9470m: After fitting this cell, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that typically appears after any cell swap on this platform.
BIOS reporting battery health as "Poor" or "Replace" after installing a new cell
The HP EliteBook BIOS reads health status from EEPROM data written during the previous cell's life. When a new cell goes in, the BIOS still references that old data and flags the battery as degraded — even though the cell is new. This is not a fault with the replacement. Run the HP Battery Check utility from BIOS (F2 at boot → Diagnostics) after completing the calibration cycle described above. Once the BIOS battery learn cycle completes, the health status updates to reflect actual cell state.
Laptop shuts down at 20–30% charge shown on the fuel gauge
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The IC was mapped to the old, degraded cell and misreads the voltage cliff on the new one. Under combined CPU and display load, the cell voltage drops faster than the uncalibrated gauge expects, triggering a hard shutdown well before 0%. Complete two full discharge-to-hibernate and charge-to-100% cycles without interruption. After that, the gauge IC recalibrates and the reported percentage aligns correctly with actual cell voltage — typically settling within ±3% by the third cycle.