The batteries that our smart devices presently use (and the majority of electronic gadgets too) consist of inflammable elements.They are lithium batteries, both Li-ion and Li-Po.

All batteries have a cathode and an anode (positive and negative), a compound which minimizes and provides electrons and another which oxidizes and gathers them. This transfer is utilized to supply the mobile phone with energy.

In all batteries, the cathode and the anode are separated by a membrane. If the cathode and the anode touch each other then they react chemically, and when it comes to lithium batteries that reaction is extremely quick. It's really not an explosion, however rather a really fast combustion. The good thing is the battery does not have enough fuel to blow up strongly but it will trigger damage to anything within a radius of half a meter.

Batteries have 3 layers (cathode, membrane and anode) rolled up numerous times on themselves in such a way that the cathode and anode never ever touch. The problem occurs when the membrane that separates them weakens or even worse, when it comes faulty from the factory like Note7.

All lithium batteries have a temperature level control circuit. If the battery warms up above a particular temperature level then the circuit will stop it from charging. High temperatures harm the membrane and as quickly as this lets the cathode and anode contact each other the combustion starts.

Anyhow, it's very important to keep an eye on our batteries. We must ensure that they never ever go beyond 60 degrees. If it begins to swell or deform it must be replaced immediately. And one thing you must never do is pierce them with a sharp object.