SMOKE ALARM BATTERIES: HOGWARTS’ SILENT PROTECTORS AGAINST FIENDFYRE & FORGOTTEN SPELLS

The Leaky Cauldron’s Safety Secret On a rainy afternoon in Hogsmeade, I ducked into Zonko’s Joke Shop—not for Weasley’s Wizard Wheezes, but for a chat with Mr. Filch, the Hogwarts caretaker (and accidental safety guru). “You’re here for the batteries, aren’t you?” he grumbled, polishing a Duster 3000. “Not as fun as Pyg