https://blog.wongcw.com/2020/10/27/iphone-12-magsafe-%e5%85%85%e9%9b%bb%e7%b0%a1%e6%b8%ac%ef%bc%9a%e6%90%ad%e9%85%8d20w-%e5%85%85%e9%9b%bb%e5%99%a8%e9%ab%94%e9%a9%97%e6%9c%80%e4%bd%b3/