https://alexnld.com/product/5-5x2-1mm-female-to-lenovo-yoga-3-big-square-first-generation-male-interfaces-power-adapter-cable-for-lenovo-laptop-notebook-length-about-30cm/?hilite="7.9��5.0mm Female to Big Square (First Generation) Male Interfaces Power Adapters for Lenovo Laptop Notebook"