OMCreate Battery Compatible with Dell Latitude E5410 E5500 E5400 E5510 Series, fits P/N KM742 WU841 T749D - 12 Months Warranty [Li-ion 6-Cell] Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Built-in IC chips to prevent overcharging, high electric current, voltage or temperature. CE-/FCC-/RoHS-Certified. Tested under strict quality control standards, strict guidelines for compatibility. Operation time: General 1.5-3 hours. Actual operation time varies depending on types of the device and the way it is used. 12 months hassle-free warranty service.We provide best prices possible on the highest quality products and the most popular brands. Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.