S7 edge exploded within 2 weeks of normal use.

One thing to bear in mind with all of this is how there are maybe a thousand different ways to charge a phone -- different charger blocks, whether connected to phones via USB, or powering wireless docks. Different USB cables. And so on. Given all of the different chargers that people have gotten into their hands over the years, it's just not safe to assume that everyone got down on their knees and replaced their existing charger with the new one that came with their phones. And so on.