The 782961-B21 is a Hewlett Packard Enterprise 12‑watt Smart Storage Battery engineered for use in Gen9 ProLiant servers. It is specifically compatible with the XL250A, XL270D and XL645D models, providing the required power backup for the servers’ storage subsystem. Designed to integrate seamlessly with HPE’s Smart Storage architecture, the battery helps maintain data integrity during power interruptions and supports the automatic monitoring and management features of the host system. This OEM part meets HPE’s quality standards, offering a reliable replacement solution for maintaining continuous operation of the designated ProLiant platforms.