How to drain a iPhone battery faster?

Basically IIm tryna drain my iPhone battery till it's dead so i can give it a full 0 to 100 charge tonight, any ideas on what apps are the most battery intensive or anything that could help? Already running every single app on the phone, flash light is on, brightness at full, bluetooth is on.

Spontaneously need to make an important call and it will die instantly.

Try playing a game, runs the battery dead fast.

  • Why does my iPhone battery drain so quick? I took my phone off the charger at about 9:30am, it's now 10:01am and it was on 100%, I hardly used it, I only went on Facebook to check the newsfeed and reply to an inbox and now it's on 87%? I was watching it go down and it goes down 1% roughly every 2 minutes. It's been happening for about a week now and I'm lucky if my phone lasts me half a day. What can I do (WITHOUT BUYING A NEW PHONE)
  • Battery on my iPhone 4S doesn't fully drain? My battery life is weird instead of draining all the way down to 1% it dies at around 12%? What can I do to change this? Or improve battery life overall?
  • Should i let my Iphone battery drain to 0%? My i phone battery last so much. If i charge at morning and check it at night the battery life is still (90-79%) but is it also ok to let my iphone batter drain till o% some of my friend told me its good to do that.
  • Just got an iPhone 5 should i let the battery drain? Got an iphone 5 couple of hours ago and when i turned it on it was abouit 50%. Its 5% now should i let it drain then charge to 100% apparently i heard thats good to do, not sure?