https://blog.wongcw.com/2021/07/14/magsafe%e5%a4%96%e6%8e%a5%e9%9b%bb%e6%b1%a0%e8%ae%93iphone%e5%af%a6%e7%8f%be%e4%ba%86%e5%8f%8d%e5%90%91%e5%85%85%e9%9b%bb/