Realme devices use a set of short system sounds for notifications, charging and battery warnings, and this low battery tone is one of those built-in alerts. Because it is instantly recognisable to Android phone users, it has been ripped and shared on soundboards where editors can reuse it without recording their own phone. Its popularity comes from that familiarity: viewers hear a real phone warning, not a cartoon alarm, so it works for tech reviews, pranks, reaction videos and memes about dying batteries and bad planning.