Earlier quoted context omitted.
Maybe they should have called the 'original' supercharger a "mechanical air compressor" instead of supercharger since the connection between the term and the definition is pretty weak, while Tesla's supercharger is an actual charger that charges more quickly than your average charger... making it 'super.'
Maybe they had more reason to call it a supercharger than you think. Supporting evidence- A turbocharger, or turbo (colloquialism), from the Greek "τύρβη" (mixing/spinning) Turbochargers were originally known as a turbosuperchargers when all forced induction devices were classified as superchargers -- Wikipedia In other words, the turbocharger was actually the origin of the concept of "turbo" meaning boosted speed/po…
"To charge" means "to load [a carriage]", "A charge" means "a [carriage] load" -- so while the metaphor is overloaded, it actually seems to applies better to charging a battery than to forcing air into a combustion engine.