"Dongle" has very negative connotations for me.
I recall the term first being used to describe gizmos for copy protection schemes back in the early eighties, usually involving some sort of serial port pass-through device. I remember at least one machine that had several of them daisy chained down the back side of the desk it was on.
Even when they worked as intended they were a real PITA, and they didn't work as intended all too often.
If I use the term "dongle" in regular conversation it will nearly always be preceded by a "#@%&*" of some sort.