Storage device backup battery for HP RAID controller 727258-B21 — single battery compatible with HP ProLiant DL/ML/SL

Backup battery for HP RAID controller, single unit compatible with HP ProLiant DL, ML and SL series servers. This storage device backup battery is designed to provide temporary power to the RAID controller cache, allowing cached write operations to be preserved during short power interruptions and enabling controlled shutdowns and cache flushes in enterprise storage environments.

Advantages

The battery provides reliable short-term power to maintain cached data integrity on the RAID controller during unexpected power loss. It is supplied as a single, replaceable module compatible with a range of HP ProLiant server models, simplifying maintenance and minimizing downtime. The design supports predictable cache behavior, helping to reduce the risk of data loss and improving system resilience for critical storage operations.

Suitable for

• Enterprise servers in racks and data center environments using HP ProLiant DL, ML or SL series
• Systems running RAID controllers that require cache retention during power events
• Maintenance and field replacement of RAID controller backup power modules
• Environments where controlled cache flush and graceful shutdown are necessary

Key specifications

• Form factor: single, replaceable backup battery module for RAID controller
• Primary function: temporary power supply for RAID controller cache retention
• Compatibility: designed for HP ProLiant DL, ML and SL server series RAID controllers
• Use case: supports cache flush, controlled shutdowns and preservation of cached writes during short power interruptions
• Installation: plug-in replacement module intended for use in server service bays or controller slots

How to use

Install the battery module according to the server and RAID controller maintenance procedure: power down the server if required by the specific service manual, remove the service-access cover, locate the RAID controller battery slot, and insert the module until it seats securely. Follow the controller firmware and server documentation to confirm battery recognition and health status. Replace the battery during scheduled maintenance or when diagnostic tools report end-of-life to ensure continuous cache protection.

Использование и обслуживание

Store and handle the battery in accordance with standard server maintenance guidelines and the manufacturer's safety instructions. Dispose of depleted batteries following local regulations for electronic waste.