Premium quality replacement Dell U4873 Battery. This 10.8 volt, lithium-ion (Li-ion) Dell U4873 Battery is rated at 6600mAH capacity and is 100% compatible with the original equipment. Battery features: Uses the highest quality graded and sorted cells. Provides excellent discharge characteristics. Utilizes state of the art printed circuit board (PCB) design to provide stable and safe performance. Undergone comprehensive quality testing throughout the manufacturing and assembly process. Includes a 12-month free replacement warranty for manufacturer's defects. We provide a premium quality compatible Dell laptop batteries. Our batteries are manufactured by ISO 9001 certified manufacturing plants using state-of-the-art technology. Our batteries are produced in conformance with quality standards and guidelines applicable to OEM battery packs. Each Dell U4873 Battery is tested throughout the manufacturing process to match or outperform the original equipments specifications for form, fit and workmanship.