HP Smart Array P400 256MB Battery Backed Write Cache Memory Module 013 – Buffalo Computer Parts
405162-B21#0D1 | HP Smart Array P400 PCI-Express 8-Channel Serial Attached SCSI (SAS) RAID Controller Card with 512MB BBWC (Battery Backed Write Cache)
HP 405836-001 256MB Battery Backed Write Cache Board for SW P400 Controller | eBay
393847-B21 - HP 393847-B21 BATTERY MODULE WITH INTEGRATED CHARGER - NI-MH, 48V, 5000MAH - FOR USE WITH THE SMART ARRAY P400 AND P800 SAS CONTROLLER BOARDS WITH BATTERY BACKED WRITE CACHE (BBWC) -