NIGHTSATAN AND THE LOOPS OF DOOM, d. Christer Lindstrom (2013)
It’s 2034, and the world as we know it has been destroyed by a nuclear war. In the barren wastes of Eastern Finland, a synth trio called Nightsatan play impromptu concerts and look for women and food. The film, which is both a parody of 80s Italian post-apocalyptic trash and an occasionally quite original piece of sci fi, includes strong (subtitled) language, violent death, full frontal nudity, child cyborgs, hermaphrodites, cannibalism and magic ritual.
At no point in the 24 minute running time are we shown where Nightsatan plug their synths in, but it's a small detail, and should not in any way impair your enjoyment of this preposterous but extremely entertaining film.