TechOrbits Battery for Dell Latitude E5400 E5410 E5500 E5510 E5550 KM668 KM742 KM752 KM760 KM970 MT186- Replacement 11.1V Battery Pack - 3 Years Warranty Longest Warranty: TechOrbits batteries are built to last; that's why we cover our batteries with an industry best 3 years warranty. Premium Components: Our batteries are beautiful on the inside and out! This battery features a Texas Instrument main board, state of the art over circuit protection, and highest grade li ion cells. Energy Efficiency: Max Utilization Technology insures that the battery is always in-sync with your power settings to give you maximum battery life for every charge. Over 1 million+ happy customers since 2010 Battery type: Li-ion; Capacity: 4400mAh; Cells: 6-cell; Voltage: 11.1V