The charging chime is a short ding from the iPhone's built-in system sounds, played when the device detects a power connection, and it has become familiar to anyone who uses an iPhone daily. As short-form video grew, creators began lifting the sound from their own phones and placing it over unrelated clips, where its everyday familiarity made the joke land instantly. It spread through TikTok and meme edits as a shorthand for powering up, recharging or getting back in the game, and it remains popular because almost every viewer recognises it without needing any explanation.