https://blog.wongcw.com/2021/01/22/magsafe%e5%8a%9f%e8%83%bd%e6%9c%89%e6%9c%9b%e9%87%8d%e8%bf%94macbook%e7%94%a2%e5%93%81%e7%b7%9a%e5%a4%96%e5%aa%92%ef%bc%9a%e9%80%99%e6%88%96%e8%a8%b1%e6%98%af%e4%b8%80%e5%80%8b%e5%a3%9e%e4%b8%bb/