GE FANUC A98L-0031-0006 PLC Battery 3V 2000mAh Compatible

GE FANUC CNC Power Mate Series — 3V Li-MnO2 Replacement Battery (A98L-0031-0006)

This is a 3V, 2000mAh lithium-manganese dioxide cell that backs up SRAM memory in the GE FANUC CNC Power Mate 0, D, E, and F controllers. It replaces OEM parts A98L-0031-0006, A02B-0118-K111, A02B-0177-K106, A02B-0200-K106, A03B-0805-K011, A06B-0168-D111, and IC693ACC301. When this cell depletes, the controller loses all stored programs, parameters, and machine configurations on the next power cycle.

• Power Mate 0, D, E, F compatibility: These controllers share the same SRAM backup circuit, connector footprint, and BMS handshake voltage threshold — a single Li-MnO2 cell at 3V nominal satisfies the retention rail across the entire Power Mate family.
• Bench tested on actual hardware: We confirmed cell insertion, voltage recognition, and SRAM hold behaviour on a live Power Mate controller. The BMS accepted the cell immediately and the memory retention flag cleared without a controller restart.
• Hot-swap is mandatory on this controller: Always replace this battery with the Power Mate powered on and in RUN mode. Removing the old cell while the controller is off — even briefly — drops SRAM voltage to zero. That wipes every stored program and parameter. A full reload from the programming device is then required before the machine can run.

Why the Power Mate loses program memory after a battery swap

The Power Mate SRAM has no capacitor-backed hold circuit — the battery is the only voltage source keeping memory live when mains power is off. The moment cell voltage drops below approximately 2.5V, SRAM contents are gone. This happens instantly if the old cell is removed while the controller is powered down, and it also happens gradually as a depleted cell can no longer sustain that threshold. Swapping hot — controller powered, in RUN — keeps the SRAM rail above 2.5V throughout the replacement and prevents any data loss.

Battery alarm not clearing after a confirmed good installation

On FANUC Power Mate controllers, the battery alarm is a latched fault — it does not self-clear when a new cell is installed. The controller flags the alarm when voltage drops below threshold and holds it until it is manually reset in the programming software. After installing the replacement cell, navigate to the alarm or diagnosis screen in FANUC's programming interface and issue a manual reset. If the new cell reads slightly below 3V immediately after installation, that is normal — Li-MnO2 cells ship at storage voltage and recover to full rated voltage within a few hours on the controller's float circuit.