Advent 7079 Replacement Battery EM-G600L2S 14.8V 4400mAh

Advent 7079 / 7084 / 7091 / 8000 — 14.8V Li-ion Replacement Battery (EM-G600L2S)

This is a 14.8V, 4400mAh (65.12Wh) lithium-ion battery for the Advent 7079, 7084, 7091, and 8000 notebook computers. It replaces OEM part number EM-G600L2S directly. If your original battery no longer holds charge or the laptop only runs on AC power, this cell restores portable operation.

• 7079, 7084, 7091, and 8000 compatibility: These four models share the same 14.8V battery rail, connector pinout, and BMS communication protocol — which is why one part number covers all of them. Swapping between these models does not require a different cell or firmware.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 7079 platform. The BMS handshake completed correctly, the charging circuit accepted the cell without fault codes, and protection cut-off triggered at the expected low-voltage threshold.
• Post-install calibration on the Advent 7079 series: After fitting this battery, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Skipping this step causes Windows to report incorrect capacity or flag a health warning that has nothing to do with the new cell.

BIOS reporting poor battery health immediately after fitting a new cell

The Advent 7079 BIOS stores battery health data in EEPROM and compares it against the connected cell on every boot. When you swap in a new battery, the EEPROM still holds wear data from the old one, so the system flags the replacement as degraded — even though the cell is fresh. This is not a fault with the replacement battery. Run one full discharge-to-hibernate cycle followed by a complete uninterrupted charge. After one or two full cycles, the BIOS recalibrates against the new cell and the health warning clears.

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

This happens when the fuel gauge IC loses calibration after a cell swap — the percentage on screen no longer matches actual cell voltage. The laptop hits the low-voltage protection threshold while Windows still shows 20–30% remaining and cuts power without warning. The fix is a calibration cycle: let the laptop discharge fully to automatic hibernate, then charge straight to 100% without interruption. Repeat this two to three times until the fuel gauge tracks correctly. After calibration, shutdown should not occur above 5–8% displayed charge.