Amnergy New Battery For Asus A32-K55 A33-K55 A41-K55 A42-K55 , R503 R503A R503C R503U 0B110-00050400; 6 Cells 5200mAh Amnergy Brand Battery Is Designed Using the Best Cells and Latest Safety Features to Work as a Perfect Replacment for the Original Battery. Guaranteed to Meet or Exceed Original Specifications. Premium Quality, 100% OEM Compatible. Brand New, Protective Retail Packaging, Each Product is Sealed with Anti-Static Shield Sleeve. Lithium Ion (Li- ion) Battery, Rechargable with No Memory Effect.