Puredick New Laptop Battery for Asus F301 F401 X301 X401 X501 A31-X401 A32-X401 A41-X401 A42-X40 -12 Months Warranty[Li-ion 6-cell 10.8V 4400mAh] Battery Type: Li-ion || Voltage: 10.8V || Capacity: 4400mAh || 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.