The Allen-Bradley 1769-BA Battery Port is a CompactLogix 3V lithium battery assembly designed to back up nonvolatile memory and the real-time clock in compatible CompactLogix controllers. This replacement battery ships separately from the controller and connects to the 1769 battery port, keeping memory and timing intact during power loss. Rockwell documentation notes that the 1769-BA is the only battery you can use with the 1769-L31 controller, making it the specific choice for these units in the CompactLogix family.
