title: What are the most battery-consuming things you can do in an iPhone-app?
body: <p>I am making an app that quickly drains the users battery. For this, I am planning on using the sound-framework for vibrating, location services, download large but empty files from the internet, use the flashlight on the back of the phone, and so on.
  I know these can effectively drain the battery, but I would like to know if there are more methods that are more or equally power/processor-consuming or that could work for this in any way?</p>
  
  <p>Examples on how to achieve 100% CPU usage is also very appreciated.</p>
  
  <p>Thanks.</p>