Storage and buffer batteries are now indispensable in a variety of technical applications (e.g., PLC controls, process control systems, heat meters, CNC controls, and much more). These batteries ensure uninterrupted operation of your system. They prevent the loss of important data during power outages or other interruptions of the main power source, saving you a lot of trouble, work, and especially valuable time. The batteries need to be replaced regularly to ensure smooth operation. The battery pack BR-2/3AGCT4A (A98L-0031-0025) from Panasonic is compatible with the following Allen Bradley models: 1747-L511 SLC 5/01 Controller 1Kb Memory, 1747-L514 SLC 5/01 Controller 4Kb Memory, 1747-L524 SLC 5/02 Controller 4Kb Memory, 1747-L531 SLC 5/03 (with 8Kb user instruction capacity), 1747-L532 SLC 5/03 Controller 16Kb Memory, 1747-L541 SLC 5/04 Controller 16Kb Memory, 1747-L542 SLC 5/04 Controller 32Kb Memory, 1747-L542P SLC 5/04 Controller 32Kb Memory, 1747-L543 SLC 5/04 Controller 64Kb Memory, 1747-L551 SLC 5/05 Central Processor Unit 16Kb Memory E-Net Processor, 1747-L552 SLC 5/05 Central Processor Unit 32Kb Memory E-Net Processor, 1747-L553 SLC 5/05 Central Processor Unit 64Kb Memory E-Net Processor, 1766-L32xxx, BA 1764-LxP, MicroLogix 1400, MicroLogix 1500, SLC-500. Please check the dimensions and pay attention to the polarity and connector.