Batterytec&reg; Laptop Battery for LENOVO THINKPAD X220 X220i X220s Series, 0A36281 0A36282 0A36283 42T4863 42Y4864 42T4867 42Y4868 42T4873 42Y4874 42T4901 42T4902 42Y4940 29+. [11.1V 4400mAh, 1 Year Warranty] Battery Type: Li-ion, Cells: 6-cell,Capacity: 4400mAh; Voltage: 11.1V 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.