Or ever go from freezing to under-hood temp. Never. There's no magic in chargers that us mere mortals buy, excluding the stuff like Oscar mentioned. Why would a charger's electrons and electron flow valve be different from a car's? Nonsense, probably left over from a time when they had really bad mechanical regulators.
Technology has made it so we can ignore so many old rules. 3k oil changes, 25k spark plugs*, tires that go to shit in 20k....
The Smart has a 30k plug interval, WTF? PO did it at like 23k.