No seriously, I always get blank stares when I ask people, I’ve called them wall chargers or power bricks, my friend called them plug chargers, my fiancee calls them dongles. What do you call these around your house, like when you’re asking someone if they’ve seen any (______)'s
Wall voltage = 120V and Wavy.
Old USB = 5V and Not Wavy.
These adapt the two. They’re also known as power supplies. The bricks in laptop cables are also power supplies, they can just handle more power. Modern high speed USB just has a whole conversation with the plug where they agree on whether to use Not Wavy 5V, 9V, 15V, or 20V.