Battery Type: Li-ion Voltage: 11.1V Capacity: 65Wh Cell: 6 Cells Replacement For: Dell Latitude E6420 E6540 E6440 E5530 E5430 E6520 Precision M2800 Series Laptops, etc. Compatible Part Numbers: N3X1D, 8858X, T54FJ, etc. SAFE and DURABLE: Brand New Batteries directly from Manufacturer. High energy efficiency, Grade A Cells ensure fast charge and low power consumption. Extended battery life, up to 500 recharge cycles. Built-in circuit protection ensures both safety and stability. 24 x 7 Email support, if there is any problem, please feel free to contact me and I will solve it for you immediately. Thank you.