Bay Valley Parts 8-Cell 14.8V 4800mAh New Replacement Laptop Battery for DELL: Studio 1440,Studio 1440n,Studio 14z,Studio 14zn,Studio 1440z DELL:0K875K,0K880K,0K899K,0K903K,0M821K,0M916K,0N672K,0P769K,0P773K,0P776K,312-0882,312-0883,3UR18650F-2-DLL-32,4UR18650F-2-DLL-32,Braxton,K875K,K880K,K903K,M821K,M916K,N672K,P769K,P773K,P776K,PP40L