About this replacement
Fujitsu LifeBook N6460 Series — 10.8V Li-ion Replacement Battery (FPCBP104AP)
This is a 10.8V, 4400mAh Li-ion replacement battery for the Fujitsu LifeBook N6460, N6110, N6420, and N6470 notebooks. It replaces OEM part numbers FPCBP104AP, FPCBP161AP, and FPCBP104. Install it when the original cell no longer holds a usable charge or fails to power the laptop off AC.
- LifeBook N6000-series compatibility: These models share the same 10.8V battery rail, connector pinout, and BMS handshake protocol, which is why one cell covers the N6110, N6420, N6460, and N6470 without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on the N6460 platform. The BMS communicated correctly with the BIOS, charge termination triggered at the expected threshold, and no protection flags tripped during load testing.
- First-cycle calibration on the N6460: After fitting this battery, run one full discharge to the hibernate cutoff point, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells in this platform.
BIOS reporting poor battery health immediately after fitting a new cell
The LifeBook BIOS reads health data stored in the battery's EEPROM. When a new cell arrives, that EEPROM data reflects factory state, not the laptop's charge history — the BIOS flags this mismatch as poor health. Running one complete discharge-to-hibernate followed by a full uninterrupted charge writes fresh cycle data to the EEPROM. After one or two full cycles, the health indicator normalises and the warning clears.
Laptop shuts down abruptly at 20–30% charge shown on screen
This is a voltage cliff, not a software bug. When the CPU and display draw full load simultaneously, the cell cannot sustain the voltage the BIOS expects at that state of charge. The system interprets the voltage drop as an empty battery and cuts power instantly. Running two full calibration cycles lets the fuel gauge IC map the actual discharge curve of the new cell. If shutdowns persist after calibration, check that the BIOS charge threshold setting is not artificially capping the cell below 10.8V nominal.