According to my understanding, the Air 3 pen may refer to the Apple Pencil (first generation) that comes with Apple's iPad Air 3. The method of charging Apple Pencil (first generation) is as follows:
1. Connect and charge: Plug the end of the Apple Pencil (first generation) into the Lightning port (charging port at the bottom of the iPad) of the iPad Air 3.
2. Charging status: When the Apple Pencil is connected and plugged into the iPad, you can check the charging status at the top of the screen. If a battery icon is displayed, it means that it is being charged.
3. Full charge: Once you start charging, Apple Pencil will display the current charge percentage. When fully charged, it will show full.
In addition, pay attention to the following points:
- It is recommended to use the original Lightning cable when charging.
- If you find that the Apple Pencil does not charge properly, please check that the interface is clean and dust-free, and make sure that the cable is working properly.
Apple Pencil is only compatible with certain models of iPad, make sure you are using the version of Apple Pencil that matches your iPad Air 3.
If you have another type of Air 3 pen, you may want to refer to its official manual or the specific brand's guide for accurate information on charging methods.
Twist the cap off the pencil, and then connect the tail plug of the device to charge it directly.