The battery percentage is not shown by default on Android Oreo, but you can enable this feature within seconds. This wikiHow will teach you how to show your battery percentage in the status bar so you can quickly see your battery usage at all times.
1Open the Settings menu. It’s the gear icon typically found on the home screen or in the app drawer. You can also find it from your notification panel.
2Navigate to settings. Tap on , located under the Apps & Notifications option. Doing so will open your battery usage details and other settings related to the battery.
3Move to the option. Toggle on the grey switch, right across the Battery percentage option to activate the feature.
4Done. Now, you can see the battery percentage in your status bar, near the battery icon. Toggle off the same switch to hide this feature.