Genuine Asus VivoBook M1603 chargers are listed below, so the Asus M1603IA and M1603QA models use the 90w ac adapter which outputs at 19v 4.74a and will plug into your laptop via the 4.5phi barrel connector tip which has a pin located in its centre, all Asus VivoBook M1603 ac adapters include both charging unit and power cord.