NOTE: Please see the QuickSpecs for Technical Specifications and additional information: http://h18000.www1.hp.com/products/quickspecs/13175_na/13175_na.html
Optional Upgrades
HP Smart Array P-Series Low Profile Battery NOTE: The Smart Array Low Profile Battery supports the HP Smart Array P700m Controller. NOTE: The Smart Array battery option kit is required to enable battery-backed write cache (BBWC).
HP 650 mAh P-Series Battery NOTE: This kit is only for use with the 256 MB Cache Module. NOTE: This kit includes the cable required to attach battery to cache.