Specification:Chemistry: Li-ion Voltage: 10.8V (Compatible with 11.1V) Capacity: 5200mAh Cell: 6 CellsCompatible Battery Models:SonyVGP-BPS22, VGP-BPS22A If you can find one of above numbers on your original battery, then it will fit your laptop.Compatible Laptop Models:"CTRL"+"F" to find your laptop model/part number printed on your laptop bottom or original battery.SonySONY VAIO VPC-E1Z1E, VPC-EA1, VPC-EA12EA/BI, VPC-EA12EG/WI, VPC-EA12EH/WI, VPC-EA12EN/BI, VPC-EA13EH/L, VPC-EA13EN/L, VPC-EA15FA/B, VPC-EA15FA/P, VPC-EA15FA/W, VPC-EA15FG/B, VPC-EA15FG/P, VPC-EA15FG/W, VPC-EA15FN/L, VPC-EA16E, VPC-EA16EC, VPC-EA16FA/B, VPC-EA16FA/L, VPC-EA16FA/P, VPC-EA16FA/W, VPC-EA16FG/B, VPC-EA16FG/G, VPC-EA16FG/L, VPC-EA16FG/P, VPC-EA16FG/W, VPC-EA16FH/B, VPC-EA16FH/G, VPC-EA16FH/L, VPC-EA16FH/P, VPC-EA16FH/W, VPC-EA17FG/B, VPC-EA17FH/B, VPC-EA18EC, VPC-EA1AGG/BI, VPC-EA1BGN/BI,VPC-EA1S1E/G, VPC-EA1S1E/L, VPC-EA1S1E/P, VPC-EA1S1E/W, VPC-EA1Z1E, VPC-EA21EG/BI, VPC-EA21EH/BI,VPC-EA21EN/BI, VPC-EA21FDBJ, VPC-EA21FDPI, VPC-EA21FDT,VPC-EA22EA/BI, VPC-EA22EG/BI, VPC-EA22EG/WI, VPC-EA22EH/WI, VPC-EA22EN/WI, VPC-EA22FXG, VPC-EA22FXL, VPC-EA22FXP, VPC-EA23EH/B, VPC-EA23EH/L,VPC-EA23EH/P, VPC-EA23EH/W, VPC-EA23EN/B, VPC-EA23EN/L, VPC-EA23EN/P, VPC-EA23EN/W