Place it at the end of a phone scene, just as the battery warning appears, then follow it with a classic error sound to underline the shutdown. For a bigger finish, let a Vine Boom sound land straight after it, so the dead battery becomes the joke's turning point.
About this sound
This short Sony Ericsson low battery alert lasts just over half a second, a brief electronic tone signalling that the phone is about to run out of power. It feels instantly familiar and mildly urgent, the kind of warning that makes you glance at the battery icon. It comes from Sony Ericsson phones, where it warned owners that the battery was nearly empty.