Amnergy&reg; New Battery for Lenovo IdeaPad Z400 Z500 P400 P500 Touch L12L4K01 L12S4K01 L12S4E21 ; 4 Cells 14.4V 3350mAh 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.