https://valkyrie.cdn.ifixit.com/media/2019/11/25131825/full_case_xray.jpg
https://valkyrie.cdn.ifixit.com/media/2019/11/25131826/connector_closeup.jpg
https://valkyrie.cdn.ifixit.com/media/2019/11/25131824/really_close_up.jpg
原來這次的相機按鍵是連接電路板，由軟體去控制，
以前看過的相機按鍵手機殼，是靠內部結構去按音量鍵；
看推特的操作影片，有防止誤啟動的設計，
長按可啟動拍照模式與鎖定螢幕。
操作影片：
https://twitter.com/thenickguy/status/1197976418761789441
情報來源：
https://www.idownloadblog.com/2019/11/26/iphone-11-smart-battery-case-x-ray/
This X-Ray Teardown Really Smarts: iPhone 11 Smart Battery Cases
zh.ifixit.com/News/this-x-ray-teardown-really-smarts-iphone-11-smart-battery-cases
http://bit.ly/2qEgJjZ