Amnergy Battery Samsung AA-PBYN4AB,AA-PLWN4AB UltraBook NP530U3C,NP530U3B ; 7.4V 6100mAh/45Wh 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. Rechargable with No Memory Effect.