So the fun thing about this is that it used to be a display model at a Babbage's, along with the Game Boy Camera that I already have. (This was all my sister's, and buried in the parental basement.) The power supply runs through a tiny hole in the back of the printer and is soldered onto the battery contacts. Also the power switch seems to be stuck in the On position and that seems to be intentional. The Game Boy is a bit worse for wear but still works!