What this battery does and where it fits
The Omron CJ1W-BAT01 is a replacement battery for the CJ1M series of programmable logic controllers. It keeps the PLC's program and retained data alive when main power is off.
What to check before ordering
Designed for the CJ1M series backplane battery holder. Verify the physical connector and polarity match your existing unit — the CJ1W-BAT01 uses a standard two-pin header. No special tools needed for replacement; swap with PLC power off to avoid data loss.