How to Check Your AirPods' Battery Life on an Android Phone using AirBattery
AirBattery serves one purpose: It shows your AirPods’ battery life on Android, and it does it well. Once the app is set up, opening your AirPods charging case will launch a pop-up window on your smartphone that displays remaining battery life (just like an iPhone would). There’s also a lock screen notification to display battery life, but you’ll have to pay for the app’s Pro mode to unlock that feature.
AirBattery also works with BeatsX headphones, and the developer plans to add support for a few other Beats models down the road. In the meantime, if you’re using Apple’s AirPods with an Android phone, this app really is a must-have.
The screenshot attached shows the battery levels after I replaced the right earbud into the carry case.