How to Find Your AirPods Case With Your AirPods in Them
With the charging case lid open, press and hold the setup button for around 15 seconds until the status light flashes from white to amber.
If you have AirPods or AirPods Pro, your AirPods and your charging case share a serial number. You can find the serial number on the underside of the lid of your Charging Case, Wireless Charging Case, or MagSafe Charging Case.
The short answer is yes you can charge your AirPod case without the AirPods inside.
Scenario 3: You've lost just one AirPod, or both AirPods in two different locations
How to Find Your AirPods Case With Your AirPods in Them
To get an estimate of the battery level of your AirPods case, remove your AirPods from the case and open it. Then check the status light, which is either on the front of the case or inside it. If the status light is green, your case is charged. If it is amber, your case has less than one charge left.
To charge the AirPods and the AirPods-case at the same time: put the AirPods into the case, and plug in the case to a power source. Yes, it is OK to leave the case plugged in all night. Good luck. Yes, plug the case into a charger and both will be charged.
This plastic material provides additional protection to the AirPods when they are inside it, and if you drop the case, it's highly unlikely that there will be any cosmetic damage. It is possible, however, that the AirPods could come out of the case due to the impact of them being dropped.
Scenario 1: They're in their case, charged, in Bluetooth range
The Directions feature in Apple's Find My app, is a fantastic way to ping an AirPod case. This feature will direct you to where your AirPods are, but not the case. That's why the feature is only useful when you've lost your case with the AirPods actually inside them.
You can still (technically) find your AirPods inside their charging case with the Find My app, but only if the app still remembers where they were the last time you used them. It's also important to mention that the Find My app is designed to find devices that aren't dead.
How to Find an AirPods Case: