TechOrbits Battery for Dell E5420 E5430 E5530 E6420 E6430 E6520 E6530 Inspiron 4420 5420 5425 7420 7520 4720 5720 7720 8858x M5y0x T54FJ N4420 N4720 N5420 N5720 N7420 N7720 Vostro 3460 3560 Laptop Notebook Battery Type: Li-ion; Capacity: 4400mAh; Cells: 6-cell; Voltage: 11.1V 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 8-hr x 5-weekday call support, 1 year hassle-free warranty Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability Operation time: Over 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.