The A0J2HCPUP21 is a battery specifically designed for the A0J2 Series Controller from Mitsubishi. This component is essential for the optimal functioning of the A0J2 controller, ensuring reliable operations and maintaining memory retention during power interruptions. As a part of the A Series CPU range, the A0J2HCPUP21 is engineered to meet the demands of industrial automation applications, providing enhanced performance and stability.