I have lost my battery usage icon in lower right that shows how much battery power you have left. It was there this morning and when I powered back up this evening it is gone.
Did you restart the computer? Also, click the chevron arrow to see if its hidden there.
Right click the Taskbar > click Taskbar settings > scroll down, click Select which icons appear on the Taskbar.
Make sure Power is toggled on.
If it still does show, check under Turn system icons on or off