Fully onboarded #USBC this year and all of the rechargable devices have this magnetised adapters attached. They are cool and I bought quite a lot of them, however they can also easily detach and if the usb cable is thick, it can move easily, which means that there is no connection. Not as good as Apple's MagSafe. I wish that they've expanded into regular USB-C stuff.

These magnet things can also transfer data, but the easily disconnecting part even gets worse with that.