Amnergy New Battery For Acer Aspire AS S3 S3-391-6046 MS2346 Ultrabook 13.3" C720 C720P,3280mAh / 36.4WH 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.