Expand the Batteries section in the Device Manager.
How do I enable battery time on Windows 10?.
Why is my power icon grayed out Windows 10?.
How do I get my battery icon back on Windows 7?.
How do I fix the battery icon on Windows 10?.
Why is my power system icon greyed out?.
You should be able to see the battery icon in your taskbar now. Scroll down until you see Power, then toggle the switch to its “On” setting. If you still don't see the battery icon, go back to the Taskbar settings and click on the “Select which icons appear on the taskbar” link from the Notification area section.