The last thing you may consider to be a fire hazard in your home is your smartphone. But if recent events are any indication, our trusty devices may have a hidden danger – their batteries.  Hope Casserly is the latest Canadian to go public with a story about her smartphone’s battery exploding.  The “battery exploded while I was asleep waking me up with a loud popping noise,” and the “Battery exploded and caught fire and burnt my mattress and bedding.” Most smartphones use lithium-ion batteries – the same batteries are found in laptops, cars and even commercial airplanes. Lithium-ion batteries are widely used by tech manufactures because they pack a good amount of power in a lightweight package. 

http://globalnews.ca/news/1714748/why-lithium-ion-smartphone-batteries-keep-exploding/