Bay Valley Parts@Replacement Laptop Battery for Dell Latitude E5400 E5410 E5500 E5510 KM742 KM769 WU841 KM771 11.1v 7800mAh 9-Cell Battery Type: 9 Cells Li-ion Capacity: 11.1V 7800mAh Color: Black Weight: 19oz Using highest quality materials including grade-A brand-new cells Meets and exceeds OEM specifications and lasts longer hours Package Includes: One unit of brand-new replacement laptop battery for Dell This product is CE & RoHS certified, so BUY WITH CONFIDENCE!!!