BRTONG Laptop Battery For ASUS A41-X550 A41-X550A X550 K550 A450 X450 - 12 Months Warranty Compatible Models: A450 Series, A550 Series, F450 Series, F550 Series, F552 Series, K450 Series, K550 Series, P450 Series, P550 Series, R409 Series, R510 Series, X450 Series, X452 Series, X550 Series Compatible part number: A41-X550 / A41-X550A / A32-X550 Battery type: Li-ion; Capacity: 2600mAh/37WH; Cells: 4-cell; Voltage: 14.4V Operation time for standard batteries: Around 1.5-2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety, About 500 recharge cycles over the life of the battery. 24 x 7 email support, 12-month hassle-free warranty