Originally Posted by
tsadude1
Magic batteries.
You are correct. The "magic flashlights" work on the magic principle. According to his unofficial bio, Kip Hawley received an "A+" in "Viewing Invisible Ancient Runes" class his third year at Hogwarts School of Witchcraft and Apparition Wizardry. Unfortunately for us, that same year he also got a "D-" in "Explosive Potions of Everyday Water."