The sound comes from Nokia devices running S60 3rd Edition, Nokia's Symbian-based smartphone platform used widely in the mid to late 2000s on models beyond the main Nseries. Unlike the earlier low battery warning, this critical version played when charge was nearly exhausted and shutdown was imminent. As clips of old phones resurfaced on YouTube and soundboards, the alert became a nostalgic shorthand for running out of power. Creators still use it because the beeps are universally understood, even by viewers who never owned a Nokia.