Put it at the end of a phone-dying scene, just after the screen goes dark, then follow it with a shocked reaction for the punchline. A camera click beforehand can set up the moment, showing the phone in use before the warning arrives.
关于此声音
This is the short low-battery alert from Android 5.1, a brief electronic chime lasting just over half a second. It feels tense and quietly urgent, like the warning you hear when a phone is about to shut down. That small jolt of worry makes it instantly recognisable to anyone who has watched a battery percentage drop.