OMCreate Laptop Battery for Dell Latitude E4300 E4310, fits P/N 312-0822 312-0823 FM332 XX327-12 Months Warranty [Li-ion 6-Cell] All products are CE-/FCC-/RoHS-Certified by reputable, qualified and accredited testing laboratories. Strict guidelines for compatibility. Built-in circuit protection. Automatic power cut off at high electric current, voltage or temperature ensures safety and extended battery life. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time: 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. Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.