BE&middot;SELL New replacement battery A32-K55 for ASUS U57 U57A X45 X 45A X45C X45U X45V X55 X 55A X55C X55U X55V X75 X 75V R400 R500A Voltage:11.1v Capacity:5200mah Brand New, Full 1 year warranty CE-/FCC-/RoHS-certified for safety