Fujitsu FPCBP149AP Laptop Replacement Battery 10.8V 4400mAh

Fujitsu LifeBook Q2010 / FMV-Q8230 — 10.8V Li-ion Replacement Battery (FPCBP149AP)

This is a 10.8V, 4400mAh (47.52Wh) Li-ion battery for the Fujitsu LifeBook Q2010, FMV-Q8230, FMV-Q8220, and FMV-BIBLO LOOX Q70TN. It replaces OEM part numbers FPCBP149AP, FPCBP147, FPCBP149, FMVNBP153, FPCBP147AP, FMVNBP151, S26391-F340-L250, and S26391-F340-L200. Install it when the original cell no longer holds a usable charge or the system refuses to run off battery power at all.

• Q-series platform fit: The FMV-Q8230, Q8220, and LifeBook Q2010 share the same 10.8V three-cell rail, connector pinout, and BMS handshake protocol. One cell covers all of them. Swapping between these models does not require any firmware change or connector adapter.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on Q-series hardware. The BMS accepted the charge handshake on first contact, balanced across all three cells without thermal event, and reported state-of-charge correctly to the OS by the second full cycle.
• Post-install recalibration on the Q2010: After fitting this battery, run the laptop down to hibernate cutoff on a normal workload — do not force-shutdown — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Skipping it leaves a false "poor health" warning in the system tray that does not reflect actual cell condition.

Why the FMV-Q8230 BIOS flags a new battery as poor health on first boot

The Q8230 BIOS reads EEPROM data written by the original factory cell to establish its health baseline. A new cell arrives with different EEPROM values — the BIOS compares them against the old record and flags the mismatch as degraded health. This is a data comparison error, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge cycle overwrites the stored baseline and clears the warning.

LifeBook Q2010 shutting down at 20–30% battery shown

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS reads a percentage based on the old cell's curve, so 20% displayed may already be below the voltage the cell can sustain under combined CPU and display load. The cell hits its low-voltage cutoff before the OS reaches its shutdown threshold, causing an abrupt power-off. Run two full discharge-to-hibernate and full-recharge cycles — after the second cycle the fuel gauge recalibrates and the shutdowns stop. Target a resting voltage of 10.8V at full charge to confirm the cell is performing correctly.