Video: Bear Grylls teaches you to survive using a mobile phone battery

[youtube]http://www.youtube.com/watch?v=XsbfsHj8ec0[/youtube]

  Let's say you crashed your plane somewhere in the middle of the desert. Let's say you have a non-functional iPhone and a sword with you. Break the iPhone, remove the battery and make a campfire, that is, if the iPhone doesn't get angry and wants to throw its battery in the air before helping to save your life. Leaving the joke aside, in the clip you have a very plausible explanation of the reason why the batteries catch fire.