About this replacement
HP EliteBook 8460p Series — 10.8V Li-ion Replacement Battery (628369-421)
This 10.8V, 4400mAh (47.52Wh) Li-ion battery replaces the original cell in the HP EliteBook 8460p, 8460w, 8470p, and 6360t Mobile Thin Client. It uses the same connector, voltage rail, and BMS handshake as the factory cell. Install it when the original no longer holds a usable charge.
- EliteBook 8460p / 8460w / 8470p / 6360t platform fit: These models share the same 10.8V rail, six-cell connector pinout, and SMBUS communication protocol — so one cell works across the whole group without wiring or firmware differences.
- Bench tested on actual hardware: We ran this battery on an EliteBook 8460p and confirmed the BMS negotiated correctly over SMBUS, the fuel gauge initialised without error, and the charge circuit accepted a full cycle from 0% to 100%.
- First-cycle calibration on EliteBook: After installing, let the laptop discharge fully until it hibernates, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting battery health as poor immediately after replacement
The HP EliteBook BIOS reads health data from the battery's EEPROM on first contact. The EEPROM on a new cell carries rated values, not real-world cycle data, so the BIOS flags a mismatch and marks health as poor or unknown. This is a calibration state, not a fault. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%, and the BIOS learn cycle will update its reference data against the new cell's actual voltage curve.
Laptop 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 capacity. The gauge reports 25% remaining, but the real cell voltage has already dropped below the threshold the system needs to sustain the CPU and display under load. The laptop cuts power before the screen number reaches zero. Run two to three full discharge-and-charge cycles — after that the gauge tracks the real voltage curve and shutdowns stop before the displayed percentage reads below 10%.