Advent 7062 Replacement Battery 14.8V 4400mAh 441684410001

Advent 7062 / 7065 — 14.8V Ni-CD Replacement Battery (441684410001)

This is a 14.8V, 4400mAh (65.12Wh) Nickel-Cadmium replacement battery for the Advent 7062 and 7065 notebook computers. It replaces the original cell when the laptop no longer holds a charge or shuts down unexpectedly under load. Fit models share the same connector pinout, voltage rail, and BMS communication protocol across this series.

• 7062 and 7065 platform fit: Both models run the same 14.8V four-cell series configuration and use an identical battery bay connector with the same BMS handshake lines. One replacement cell covers both laptops without any adapter or modification.
• Bench tested on actual hardware: We cycled this cell through full charge and load discharge on a 7065 unit. The BMS negotiated correctly, charge termination fired at the expected voltage ceiling, and the fuel gauge IC accepted the new cell without throwing a fault code on the first cycle.
• Ni-CD first-use conditioning on the 7062: After fitting, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. Ni-CD cells in this system require a complete learn cycle before the BIOS battery health monitor stops reporting an inaccurate capacity reading.

BIOS reporting poor battery health immediately after fitting a new cell

The Advent 7062 BIOS stores charge history and health data from the previous cell in its battery learn registers. When a new cell goes in, the BIOS compares real-time readings against that stale data and flags the battery as degraded. This is not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — this forces the BIOS to overwrite the old learn data. After one or two complete cycles, the health warning clears.

Laptop shutting down at 20–30% charge shown on screen

This happens when the cell voltage drops below what the system needs to sustain simultaneous CPU and display load, even though the OS fuel gauge still shows charge remaining. The fuel gauge IC has not yet calibrated itself against the new cell's actual discharge curve. The reading and the real voltage diverge — the laptop shuts off because power is gone, not because the gauge hit zero. Run two full discharge-to-hibernate cycles without interrupting the charge phase, and the fuel gauge IC will recalibrate its cutoff estimate to match the new cell's actual 14.8V curve.