I thought the only additional feature of the supercharged one is to make creepers blow up when they land. Now I get it, makes much more sense, considering Half-Life origin

Wiki says that you can make the supercharged one by being near a lightning - e.g. by creating a Twilight Forest portal - and having the ordinary one in the hotbar. Any experience with that?

Force field - ah, that's what is that strange empty-looking building with two levers with a very scary labels on them, near your grinder factory. Awesome!
Could you please invite me to the first test if it is possible?