ASUS 19V 2.37A 45W AC Adapter for Asus Zenbook UX21E and UX31E Series Notebooks (ADP-45AW)
ASUS Original 19V 2.37A 45W Replacement AC Adapter for Asus - Zenbook Ultrabook UX31E Series Laptop:    Asus ZenBook UX31E, Asus ZenBook UX31E-081A2677M, Asus - Zenbook Ultrabook Laptop UX31-DH72, 100% Compatible With P/N: 90-XB34N0PW00000Y, ADP-45AW, N45W-01, 0A001-00230000-0A200-00021000.