This is why you shouldn't bite an iPhone battery
 

We're nothing if not helpful here at Engadget and we're always looking out for your wellbeing. So today we have a little bit of advice for you -- don't bite your iPhone battery. One man found this out the hard way, Appleinsider reports, causing a min...

https://www.engadget.com/2018/01/23/...ery-explosion/