HP Pavilion dv4-1000 Series HP Pavilion dv4-1100 Series HP Pavilion dv4-1200 Series HP Pavilion DV4 series: DV4T-1000, DV4Z-1000, DV4T-1100, DV4-1114, DV4-1117, DV4T-1200, DV4Z-1200, DV4-1220, DV4-1222, DV4-1225, DV4-1228, DV4-1287, DV4-1428 Part Numbers:- 9J.N8682.901 ,495646-001 ,486901-001 , NSK-H5501, 9J.N8682.501, PK1303V01X0,MP-05583US66981, PK1303Y0500