This is accessory for our K2 power bank , fits for dell laptop with 4.5*3.0mm power port,

• Product Name : DC Connector ;Use for Dell Laptops with 4.5*3.0mm Laptops Connector/Adapter
• Plug Type : 2.1 x 5.5mm to 4.5 x 3.0mm; Material : Plastic, Electric Parts
• Net Weight : 72g
• Package Content : 1 x DC Connector

Product Name : DC Connector ;Use for Dell Laptops with 4.5*3.0mm Laptops Connector/AdapterMAXOAK TECHNOLOGY COMPANY