以百分比顯示電量狀態。
The status icon in the top bar shows the charge level of the main internal battery, and whether it is currently charging or not. It can also display the charge as a percentage.
在頂端列顯示電量百分比
Open the Activities overview and start typing Power.
Click Power to open the panel.
In the Suspend & Power Button section, set Show Battery Percentage to on.