https://blog.wongcw.com/2018/11/16/usb-c-18w-pd%e8%bc%b8%e5%87%ba%e8%98%8b%e6%9e%9cipad-pro%e5%8e%9f%e8%a3%9d%e5%85%85%e9%9b%bb%e5%99%a8%ef%bc%88a1695%ef%bc%89%e6%b7%b1%e5%ba%a6%e8%a9%95%e6%b8%ac/