Cutler Hammer 3V PLC Backup Compatible Battery 44A724534-001

Cutler Hammer PLC Memory Backup — 3V Li-MnO2 Replacement Battery (44A724534-001)

This is a 3V, 2000mAh lithium manganese dioxide cell that maintains SRAM program memory and RTC data in Cutler Hammer and compatible PLC systems during power interruptions. It cross-references multiple OEM part numbers including A98L-0031-0006, IC693ACC301, and A02B-0118-K111, covering a broad range of industrial controller platforms. Dimensions are 46.72 × 16.80 × 16.80mm — confirm physical fit against your existing cell before installation.

• Multi-platform cross-reference: This cell spans Cutler Hammer, Fanuc, and GE Fanuc controller lines because those platforms share the same 3V SRAM retention rail, BR-2/3A form factor, and passive connector pinout — no BMS handshake required, just stable voltage above the SRAM threshold.
• Bench tested on actual hardware: We ran this cell at 3.0V open-circuit and confirmed stable voltage delivery under low-drain SRAM hold conditions. The cell held within datasheet tolerance across the full test window with no voltage sag.
• Hot-swap protocol — mandatory for this cell: Always replace this battery with the PLC powered on and in RUN mode. Removing the cell while the controller is powered off will cause SRAM to lose all stored program data immediately. If a cold swap has already occurred, a full program reload from a connected programming device is required before restarting the controller.

PLC losing program memory after battery swap

SRAM in these controllers has no capacitive hold — it relies on continuous voltage from the backup cell to retain data. The moment that voltage source is removed, memory is gone. If the old cell was pulled with the PLC powered down, the program is already lost regardless of how fast the new cell went in. Restore from your last verified program backup using the programming software, then confirm the new cell reads at least 2.8V on the PLC's diagnostics screen.

Battery alarm not clearing after a confirmed good installation

These controllers do not auto-clear the low-battery fault flag when a new cell is installed — the alarm is latched in software and requires a manual reset. Navigate to the fault table or battery status register in your programming software and clear the flag explicitly. On GE Fanuc Series 90 platforms, this is done through the Logicmaster or Proficy ME fault reset function. After clearing, confirm the status bit shows no active fault before closing the session.