If you are interested in what the new AirTags look like from the inside, you can now check ifixit or watch the following video.
The inner construction is not very surprising: everything is very compact and naturally follows the round shape of the AirTag. However, the way Apple has implemented the speaker is very interesting: the small plastic tray, which contains the batteries, also serves as a speaker.
This can be seen well on the back: there you can see the attached magnet, which is excited by a coil located in the remaining area of the AirTag. This is a very space-saving solution to teach the AirTag to beep. Accordingly, it can also be easy to deactivate this built-in speaker for locating and warning (if a foreign AirTag is in the vicinity).
