If you're using your Airpods with an Android device, you should check out the AndroPods app, it allows you to see your Airpods' charge levels from the notification panel and also via
How to check your Apple AirPods' battery life on Android
How to Use AirPods With an Android
How to check your Apple AirPods' battery life on Android
AirPods Battery APK for Android Download
How to Check AirPod Battery Levels on an Android Phone
How to check AirPod battery on Android phones - CNET
How to check AirPod battery on Android phones - CNET