About this item 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: 16V Output Amperage: 4A Plug Size: 6.5mm X 4.4mm (Centre Pin)