A PLC lithium battery is a specialized lithium-based power source designed to provide backup or continuous power to Programmable Logic Controllers (PLCs)—industrial computers used for automation in manufacturing and other processes. These batteries ensure that PLCs retain critical data, such as system memory, real-time clock settings, and user programs, in the event of a power outage or during maintenance.

Key Features:
Lithium Chemistry: PLC batteries typically use lithium-thionyl chloride (Li-SOCl₂) due to its high energy density, long shelf life, and wide temperature range, making it ideal for industrial environments.

Long Life: These batteries can last anywhere from 5 to 10 years or more, depending on usage and environmental conditions.

Compact and Reliable: They are usually compact in size, easy to install, and known for their reliability in critical automation applications.

Applications:
Industrial automation systems

Factory machinery

Building management systems

Remote monitoring and control systems

Benefits:
Non-volatile memory support: Maintains data even when the main power is off.

Low self-discharge: Can hold charge for years without significant capacity loss.

Wide operating temperature: Functions effectively in harsh environments.

Popular PLC brands like Siemens, Allen-Bradley, Mitsubishi, and Omron often use these types of batteries as integral components of their systems. Always ensure compatibility with your specific PLC model when selecting a replacement battery.