Power4Laptops AC Adapter Laptop Charger Power Supply For Asus K53U, Asus K53Z, Asus K54, Asus K54C, Asus K54H Power4Laptops Branded Replacement Charger - Unlike cheaper Power Supplies, Power4Laptops products are Electrical Safety Tested in the UK and CE Certified to guarantee your safety Overvoltage and Overcurrent Protection Circuits built in - In the event of a power surge the Power Supply will blow before it damages your equipment. Output Voltage: 19V Output Amperage: 4.74A Plug Size: 5.5mm X 2.5mm