Fujitsu LifeBook A512 Replacement Battery 10.8V 4400mAh

Fujitsu LifeBook A512 / AH532 — 10.8V Li-ion Replacement Battery (CP567717-01)

This 10.8V, 4400mAh (47.52Wh) Li-ion battery replaces the original cell in the Fujitsu LifeBook A512, A532, AH532, and AH562 series notebooks. It matches OEM part numbers CP567717-01, FMVNBP213, FPCBP331, FPCBP342, and FPCBP347AP. The connector pinout and BMS communication protocol align with the original so the BIOS recognises the pack on first boot.

• LifeBook A-series and AH-series compatibility: The A512, A532, AH532, and AH562 share the same 10.8V three-cell-series architecture, identical battery bay dimensions, and the same SMBus BMS handshake. One pack covers all four platforms without modification.
• Bench tested on actual hardware: We ran this pack on an AH532 unit and confirmed the BMS negotiated correctly with the BIOS on first insertion. Charge acceptance reached full 4400mAh capacity across three consecutive cycles with no cell balancing faults logged.
• First-cycle calibration on LifeBook systems: 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 in Fujitsu's power management utility after every cell swap.

Why the LifeBook A512 shuts down at 20–30% after a battery swap

The LifeBook BIOS builds a voltage-to-capacity curve from the previous cell's EEPROM data. When a new cell goes in, that curve no longer matches the actual chemistry. Under full CPU and display load the voltage drops faster than the old curve predicts, and the BIOS interprets a normal mid-discharge dip as a critically low state. The system forces a shutdown even though usable capacity remains. Running two complete discharge-to-hibernate and full-charge cycles overwrites the learned curve with data from the new cell and stops the premature cutoff.

Fuel gauge reading 0% or "unknown" immediately after fitting this pack

The fuel gauge IC on the LifeBook motherboard holds EEPROM values from the old cell — charge count, rated Wh, and internal resistance baseline. A fresh cell presents different impedance figures and the IC flags the mismatch as an unrecognised pack, displaying 0% or "unknown battery" in Windows power settings. This is not a fault with the replacement cell. Charge the pack to 100%, let it rest for ten minutes, then discharge fully to hibernate. After two of these full cycles the fuel gauge IC recalibrates against the new cell's actual data and the reading stabilises.