Buy AirPods (3rd generation) with Lightning Charging Case - Apple
Identify your AirPods - Apple Support (EG)
How to Check AirPods Battery Life - MacRumors
11 Ways to Check the Battery Life of Your AirPods, AirPods Pro, or AirPods Max « Gadget Hacks
11 Ways to Check the Battery Life of Your AirPods, AirPods Pro, or AirPods Max « Gadget Hacks
How to check your AirPods battery level
If you see Service Recommended on your MacBook Air or MacBook Pro - Apple Support
How to check the battery on Apple AirPods
Charge your AirPods and learn about battery life - Apple Support