BTExpert Battery for Asus X451 X551 X451C X451CA X551C X551CA X551CA-SX024H X551CA-SX029H X551CA-DH21 2200mah 4 Cell - Color - - Dimensionmm - mm - Type - Lithium Ion. - Capacity - 2200Mah - Unit Cell - 4 - N.W.G - 270 This Replacement Battery Is Guaranteed To Meet Or Exceed Original Specifications. Quality: Durable and Utilizes high quality grade "A" cells for higher performance and more reliability. Fast charging. Low power consumption. Built-in protection circuit ensures both safety and stability. Buy with confidence!: The most cost effective and long lasting product available on the market today. Peace of Mind - 30 day worry free/no question ask return policy. Fast Shipping Peace of Mind!: Freshly produced and environmentally friendly and certified merchandise. We don't keep these on shelf because of our high-volume sales. We are able to sell good quality products at low prices because we buy direct from Manufacturers & Distributors in bulk quantity. BTexpert is a registered trademark protected by the US Trademark Law and is marketed exclusively by BTEXPERT. Any attempt to copy, relist or resell of BTexpert products without permission is prohibited; we reserve the right to take action against violators.