Mitsubishi MDS-A-BT-4 CNC Backup Battery for MDS Series

The Mitsubishi MDS-A-BT-4 (MDS-A-BT-4) is a dedicated backup battery designed for Mitsubishi MDS series servo drives and computer numerical control systems. Engineered to maintain absolute position encoder data and critical volatile memory during system power-downs, this battery unit prevents the loss of machine reference positions and parameter settings. It is widely applied across CNC machine tools, industrial milling centers, lathes, and automated manufacturing systems equipped with Mitsubishi CNC automation equipment. This genuine replacement battery is equivalent to and cross-referenced with part numbers BT-4, BT4, FCUA-BT-4, FCUABT4, and MDSABT4. It provides reliable DC backup power directly to the servo drive and control architecture, safeguarding against operational disruptions and minimizing the need for manual zero-point re-referencing after planned or unexpected power outages. Replacing aging batteries with the Mitsubishi MDS-A-BT-4 ensures optimal system availability, preserves axis configuration data, and maintains seamless machine continuity across industrial automation environments.