Batterytec&reg; Laptop Battery for ASUS A41-X550 A41-X550A A450 P550 F550 k550 R510 X450 X550 A450C A550C X550A X550B X550D. [14.4V 2200mAh,1 Year Warranty] Battery Type: Li-ion, Cells: 4-cell,Capacity: 2200mAh; Voltage: 14.8V. 100% New Manufacturer. To 500 charging cycles during the lifetime of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12 months warranty without problems. Class A cells provide fast loads and low power consumption, chip protection offers both security and stability.