This is brand-new and high-quality product which can convert round connector to Rectangle connetor.
It is 7.9mm Round Jack (old type) to Rectangle Plug End (new type) Adapter Pigtail.
There is special IC inside for IBM Lenovo Thinkpad.
It is a special power converter cable for IBM Lenovo ThinkPad Edge Laptop Notebook PC such as X1 Carbon Yoga 13 or other future laptops which DC input port is Rectangle.
You need make sure the AC adapter voltage and current to be same as your original one.
Female: 7.9*5.5mm
Male: Rectangle with Pin
You can connect this adapter between old type round jack to latest laptop with Rectangle DC input port.
Package Includes:
Convertor Connector 1 pc Note: AC adapter in pictures is not included!
7.9mm Round Jack to Square End Adapter Pigtail for IBM Lenovo Thinkpad Ultrabook