Samsung AD-4019, AD-4019S, PA, 1400-14 Laptop AC Adapter

DC 19V  / 2.1A, Adapter Power: 40W, Connecter Size: 5.5mm*3.0mm

Source: http://batteries-battery.com/Samsung-AD%7B2d%7D4019-AD%7B2d%7D4019S-PA%7B2d%7D1400%7B2d%7D14-Laptop-AC-Adapter-p-2120.html