BRTONG High Performance [9-cell 11.1V 6600mAh] Laptop Battery for Dell Latitude E6420 E6430 E6520 E6530 E5420 E5430 E5520 E5530 Laptop Battery; Dell Part T54FJ - 18 Months Warranty Battery type: Li-ion; Capacity: 6600mAh/73WH; Cells: 9-cell; Voltage: 11.1V. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time: the actual operation time will depend on how much electricity is required by the device and how you use it.