About this replacement
HP EliteBook 2560p / 2570p — 11.1V Li-ion Replacement Battery (HSTNN-DB2L)
This is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the HP EliteBook 2560p and EliteBook 2570p laptops. It replaces original cells that have degraded, failed to hold charge, or dropped to unusable capacity. Fits the OEM part numbers HSTNN-DB2L, HSTNN-DB2M, HSTNN-I08C, 632423-001, and the full SX03/SX06/SX09 series.
- EliteBook 2560p and 2570p compatibility: Both models share the same 11.1V three-cell architecture, battery connector pinout, and BMS handshake protocol. That is why a single part number covers both — the BIOS reads the same EEPROM data from either battery without needing a firmware change.
- Bench tested on actual hardware: We ran this cell on an EliteBook 2560p under combined CPU and display load. The BMS held the voltage rail stable through the full discharge curve. No unexpected cutoffs were triggered at mid-charge states.
- Post-install calibration tip for the 2560p and 2570p: After installing, 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 on the first boot after every cell swap.
BIOS reporting poor battery health immediately after replacement
The HP EliteBook BIOS reads health data from the battery's EEPROM chip, not from live voltage measurements. When a new cell goes in, the EEPROM carries default factory data that the BIOS interprets as degraded or unknown. This is a data mismatch, not a fault with the replacement cell. Running the BIOS battery learn cycle — one full discharge to hibernate, then an uninterrupted charge to 100% — rewrites the health registers and clears the warning. After two full cycles, the BIOS typically reports normal status.
EliteBook 2560p shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The laptop shuts down because the real cell voltage hits the hardware cutoff while the OS gauge still shows 20–30% remaining — the two are out of sync. It is not a cell defect. Run two full discharge-to-hibernate and charge-to-100% cycles without interruption. After the second cycle, the fuel gauge recalibrates and the shutdown threshold aligns to the correct voltage floor of approximately 9.0V.