Place it at the end of a phone scene, just as the battery warning appears, then follow it with the Classic Error Sound to signal the phone shutting down. For a lighter edit, put a Bell Ding before it to mark the first warning.
关于此声音
This is the short low battery alert used on Sharp phones released between 2013 and 2018, lasting just over one second. Its brief electronic chime is instantly recognisable as a phone warning, giving a small jolt of urgency without sounding harsh. It feels familiar and slightly tense, like the moment a device asks to be plugged in before it dies.