The leftmost part of the upper right corner of the mobile phone shows the percentage of remaining power. The closing method is: 1. Click settings first (I use Huawei mobile phone). 2. Then click on the battery in the drop-down page, and the percentage of remaining power will be displayed at the bottom of the page (displayed in the status bar). 3. Then close it.

I wonder if these steps I mentioned are suitable for your mobile phone? I hope I can help you and adopt them.