The Dell PERC (PowerEdge RAID Controller) family of enterprise-class controllers is designed for enhanced performance, increased reliability and fault tolerance, and simplified management - providing a powerful, easy-to-manage way to create a robust infrastructure and help maximize server uptime. The PERC battery maintains your PERC running smoothly and helps with your data saving and reading speed. It works with specific types of PowerEdge servers. This product has been tested and validated on Dell systems. It is supported by Dell Technical Support when used with a Dell system. Highlights : - Supports PERC5/I - Maintains your PERC running smoothly - Helps with your data saving and reading.