Dtk New Laptop Battery for Dell Latitude E5420 E5430 E5520 E5530 E6420 E6430 E6520 E6530 Laptop Battery - Dell Part T54fj - 12 Months Warranty [ 6-cell 11.1v 5200mah ] Notebook Battery Battery type: Li-ion; Capacity: 5200mAh; Cells: 6-cell; Voltage: 11.1V. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. 24 x 7 email support, 12-month hassle-free warranty. Operation time for standard batteries(6-cell, 5200mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.