It sure looks like the Galaxy Note 9 will have a Bluetooth S Pen. But why?
https://thenextweb.com/gadgets/2018/07/04/it-sure-looks-like-the-galaxy-note-9-will-have-a-bluetooth-s-pen-but-why/
It looks like S Pen on Samsung’s Galaxy Note 9 is getting a big update: Bluetooth.
A filing with the FCC suggests the Note 9’s S-Pen will connect to the phone via Bluetooth LE. Previous devices used inductive styluses that didn’t require an internal battery, basically using a form of wireless power. But considering the S-Pen worked even when hovering above the screen, why would it need Bluetooth?