Egoway 5200mAh Battery For Asus A31-X401 A32-X401 A41-X401 A42-X401, fits F301 F401 F501 S301 S401 S501 X301 X401 X501 Series Equipped With Higher Quality SAMSUNG Cells yet has Same Size & Shape as an OEM Battery ; Battery Type: Li-ion; Voltage: 11.1V; Capacity: 5200mAh; 6 Cell. Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety Contain with Durable cells; Low power consumption IC design; Tested with strict quality control standards; Direct warranty from Manufacturer. 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. Warranty: 18 Months, 30 days money return guarantee, 24 x 7 email support.