This is the battery for many HP Smart Array controllers. It is widely compatible in both G9 and G10 servers. Close to the backplane you’ll notice a small notch. This notch accepts the tab seen on the battery. It is then further held in usually by a blue clip. The wire connects straight to the motherboard. Functionally, this battery maintains the RAID cache in the event of power loss.
HP Smart Array Battery 878643-001

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Part Number
- 878643-001