Warranty 1 Year Voltage 11.1V Battery Type External Cells 6 Cell Cell Type Li-ion 18650 cell Battery Capacity 4000mAh Watt-Hour 44Wh Compatible with VAIO SR Series, VAIO FW series, VGN-SR16/P VGN-FW139E/H , VGN-FW145E/W, VGN-FW17 , VGN-FW190EBH ,VGN-FW190EDH , VGN-SR18/J , (Digital certification, without CD and free from Bios update.)