TAUPO New Laptop Battery Replacement for Dell Latitude E5500 E5510 E5400 E5410 Series, fits P/N KM742 WU841 RM661 T749D - 12 Months Warranty Battery type: 6-cell; Capacity:49Wh; Voltage: 11.1V Color: Black Compatible part numbers: KM668, KM742, KM752, KM760, KM970, MT186, MT187, MT193, MT196, MT332, RM649, RM656, RM661, RM668, PW640, PW649, PW651, WU841, WU843, WU852, T749D, U116D, W071D, X064D, P858D 100% New from Manufacturer. Rechargeable Up to 500 times over life of battery Built-in circuit protection. Automatic power cut off at high electric current, voltage or temperature ensures safety and extended battery life CE-/FCC-/RoHS-Certified for safety, 12 months hassle-free warranty