Amnergy Battery 45N1762 45N1763 45N1760 45N1761 for Lenovo ThinkPad E550 E555 E550C 3INR19/65-2 76+; 4400mAh 6 Cells 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.