H7 BATTERY: HOGWARTS’ POWER STONE FOR CARS, CASTLES & BEYOND

The Leaky Cauldron’s Hidden Magic Behind the clinking mugs of Butterbeer and the crackle of the fire, I spotted something unusual on the bar: a small, rectangular block, gleaming like a polished Goblet of Fire. “That’s no goblet,” the bartender grumbled, wiping a glass. “That’s an H7 battery. Powers more magic than you’d th