Lately, there have been reports of incidents involving lithium battery exploding in Hover Board/ Smart boards. In general, exploding batteries are actually nothing new for consumer electronics: Smartphones, laptops, electric cars, and more have all had numerous reports of battery explosions. In most cases, the heat-sink system or cooling components included in the device are not enough to keep the operating at a safe temperature. In case of Smart Boards, the batteries are so large and powerful that the resulting fires can be large enough to leave a bigger impact.
We would like to take this opportunity to explain why and help you prevent that from happening to you as there are many other varying factors that could possibly be the reasons for above.
Non-standard plugs- Many of the boards that blew up had been supplied with non-standard plugs (US Standard plugs) which do not contain fuses, causing the boards to overheat and explode/catch fire. The fires and/or explosions were often caused when people left the board charging overnight with the non-trustworthy devices.
To tell if your board is not safe, you should check both if the charger will not fit into the plug, and if the packaging has a CE mark, since all of the boards that exploded did not have one.
Low quality lithium-ion batteries- The boards that exploded all had batteries without over charge protection. This means if it is overcharged, it can explode and possibly cause fire. Mainly, the components that keep these devices cool are not enough to keep the Hover board / Smart board at a safe temperature, resulting in the product exploding.
Another reason is fake or non-certified battery cells. In some cases low end battery manufacturers sometimes uses used or incompatible battery cells that is highly dangerous.