Allen-Bradley 1756-BA2 Battery Assembly

Allen-Bradley 1756-BA2 Battery Assembly is a compact 3V lithium battery module designed to back up the memory in Allen‑Bradley 1756‑L6x ControlLogix controllers in Series B. It provides nonvolatile memory retention and powers the controller’s internal clock during power loss, helping preserve program data and configuration when main power is interrupted. The battery assembly uses a 3V lithium cell and is sized to fit the BA2 installation footprint with a 0.68‑inch diameter and about 1.38‑inch length, and a capacity around 1200 mAh. It is rated for an operating temperature range of 0 to 60°C (32 to 140°F), making it suitable for many industrial environments. Specifically designed for 1756‑L6x Series B controllers, the BA2 system is intended to maintain memory integrity in back‑to‑back power cycles and should be replaced with an authentic Allen‑Bradley part to ensure compatibility and reliable operation.