Why do these hoverboards keep exploding or causing fires? It has to do with business.
Because these misnomers (they don’t really hover, they simply ‘scoot’) are so popular, a lot of manufacturers use cheaper, mass produced components, such as batteries. The way these hoverboards are used (they get banged about often on the pavements) makes them prone to damage. Once the parts are damaged, there’s no telling what could happen.
Take the batteries, for example. In a battery, the anode and cathode are aligned, with the separator between them preventing them from short circuiting. When the cheaper types of batteries get jostled around, they are easily punctured, misaligned, etc. This will cause them to, among other things, burst into flames. Hence, the news item below: