https://blog.wongcw.com/2020/10/23/iphone-12-magsafe%e5%85%85%e9%9b%bb%e5%af%a6%e6%b8%ac%ef%bc%9a%e6%99%82%e9%95%b7%e6%98%af20w%e6%9c%89%e7%b7%9a%e5%85%85%e9%9b%bb%e5%85%a9%e5%80%8d/