Super Power Supply&reg; 7.9mm Diameter Lenovo Tip Adapter Connector Converter Cable for Lenovo Essential/Ideapad to Lenovo Ideapad Yoga 11, 11s, 13, 2 Pro, Flex 14, 15 ; Lenovo ThinkPad Helix, x240, Carbon X1 ; Compatible P/n 0b46994, 0c19868, 0b47046, 0b47048 Ultrabook Netbook Notebook Battery Plug