Xiemin 7.9x5.5mm Portable Adapter Converter Cable for Lenovo Thinkpad X1 Carbon 0B47046 Ultrabook Notebook Pc Tab Power converter Cable Adapter for Lenovo ThinkPad X1 Carbon 0B47046 Laptop. Tip Connecter size: 5.5*2.1mm. Length: 7" (7 Inch) long.------electric current  2.25A / 3.25A / 4.35A