Capacity: 10.8-11.1v 4,400-5,200mah Asus A31- ... -U20, Asus A32-U50, Asus A32-U80, Asus A33-U50 Capacity: 5200mAhVoltage : 11.1VColor : BlackProduct Type: ReplacementBattery Type: Lithium ionCompatible Part ... U80V, Asus U81, Asus U81A, Asus U89, Asus U89V Laptop Battery with 6cell 5200mAh Capacity Replacement Battery for U20 U30 U50 U50F