Puredick&reg; New Laptop Battery for Dell Latitude E5420 E5430 E5520 E5530 E6420 E6430 E6520 E6530 Inspiron 4420 5420 5425 7420 4520 5520 5525 7520 4720 5720 7720 M421R M521R N4420 N4520 N4720 N5420 N5520 N5720 N7420 N7520 N7720 Vostro 3460 3560 Series Laptop Battery - Dell Part T54fj Notebook Battery-12 Months Warranty [Li-ion 6-cell 11.1V 5200/58Wh] Battery Type: Li-ion || Voltage: 11.1V || Capacity: 5200/58Wh|| Color: Black||Cells: 6-cell 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. CE-/FCC-/RoHS certificated for safety,12 months warranty,professional technical support, efficient and always satisfied customer service 24 x 7 email support. Operation time:Same Battery life with Brand new original Dell battery.In reality, this will depend on the amount of electricity required by the device and how you use it