https://blog.wongcw.com/2021/05/15/%e7%be%8efda%ef%bc%9aiphone-12%e5%92%8cmagsafe%e5%b0%8d%e6%a4%8d%e5%85%a5%e5%bf%83%e8%87%9f%e8%b5%b7%e6%90%8f%e5%99%a8%e7%9a%84%e6%82%a3%e8%80%85%e7%9a%84%e9%a2%a8%e9%9a%aa%e5%be%88%e4%bd%8e/