To bring back the battery time remaining in Windows 10, you just need to make a few edits in the Windows Registry.

Open the Registry Editor by hitting Start and typing “regedit.” Press Enter to open the Registry Editor and then permit it to make changes to your PC.

In the Registry Editor, use the left sidebar to navigate to the following key. Once here, we’re going to locate and delete a few entries: EnergyEstimationDisabled and UserBatteryDiscarcherEstimator

right-click the EnergyEstimationDisabled value in the right pane and select “Delete” and click “Yes” to confirm.

Repeat the same process for UserBatteryDiscarcherEstimator.

right-click the Power  key in the left pane and select New > DWORD (32-bit) Value.

Name your new value EnergyEstimationEnabled.

Double-click the new value, ensure the “Value Data” field is set to 1, and click “OK.”

Close Registry Editor and restart your machine.