Panasonic CF-VZSU0WU Replacement Battery 7.6V 2600mAh

Panasonic CF-XZ6 Series — 7.6V Li-Polymer Replacement Battery (CF-VZSU0WU)

This is a 7.6V, 2600mAh (19.76Wh) Li-Polymer replacement battery for the Panasonic Toughbook CF-XZ6 and CF-XZ62 series ultraportable laptops. It fits all CF-XZ6 variants including the CF-XZ62DCQR and CF-XZ62FKQR, covering OEM part numbers CF-VZSU0WU, CF-VZSU0XU, and CF-VZSU0ZU. Swap it in when the original cell can no longer hold a stable charge through a full field session.

• CF-XZ6 and CF-XZ62 platform fit: All CF-XZ6 and CF-XZ62 variants share the same battery bay geometry, connector pinout, and BMS communication protocol — the same cell powers every model in the line without modification.
• Bench tested on actual hardware: We ran this cell on a CF-XZ6 unit, cycling it through full charge and discharge. The BMS negotiated cleanly, charge current stepped down correctly at the top of the voltage curve, and the protection circuit tripped at the expected low-voltage cutoff without fault codes.
• Post-install discharge cycle on the CF-XZ6: After fitting this battery, 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 after every cell swap on this platform.

BIOS reporting poor battery health immediately after swapping the CF-XZ6 cell

When the CF-XZ6 BIOS flags a new battery as degraded or poor health straight after install, the cause is almost always stale EEPROM data from the previous cell — not a fault in the replacement. The BIOS compares the new cell's reported charge capacity against a learned baseline stored from the old battery. Until the system runs a full learn cycle, those figures won't match. Complete one full discharge to hibernate-cutoff followed by an uninterrupted charge to 100%, then check BIOS battery status again.

CF-XZ6 shutting down at 20–30% state of charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge reads 25% but the cell voltage has already dropped below the threshold the load demands under full CPU and display draw — so the system cuts out. It is a calibration gap, not a defective cell. Run two to three full charge-discharge cycles and the gauge IC will map the new cell accurately. After calibration, shutdown should not occur above 5–7% indicated charge.