LSI MegaRAID 9271-8i SAS 6Gb/s PCIe 1GB RAID Controller with cache battery
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462976-001-RFB, Hewlett Packard Enterprise Battery backed write cache (BBWC) battery module - Ni-MH, 4.8V, 650mAh - For use with the P212, P410, and P411 SAS controller boards | EET
Dell PowerEdge PERC 5i SAS/SATA RAID Controller w/ RAID Battery & Holder RP272 | eBay