eTrade Power&reg;Baterry for Asus R500V Asus SERIES: A45 A55 A75 K45 K55 K75 R400 R500 R700 U57 X45 X55 X75 for Asus A32-K55 A33-K55 A41-K55 Laptop Notebook Computer PC [6 Cell 11.1V 4400mAh]