The circle slid to the right, turning a vibrant, confident blue.

(^) in the system tray and drag the battery icon back to the visible area. Microsoft Learn Windows 10 Customize the Taskbar in Windows - Microsoft Support

Under the tab, scroll down to find Windows Explorer . Right-click on Windows Explorer and select Restart .

Another lightweight option is , which can display battery percentage in the system tray.

This means Windows has detected a problem. Hover over the icon. It usually says "Plugged in, not charging" or "No battery detected." This often requires checking your power cord or replacing the internal battery.

If the Power option is grayed out or set to "Off" with no way to change it, you may need to use Device Manager or restart the Explorer process:

Install it from the Microsoft Store and you'll immediately see a percentage icon in your taskbar.

If Windows doesn't think you have a battery at all, the icon will never appear. This is usually a driver problem.