Is a situation that seems by moments legend urban, but actually them smarpthones can exploit, because of its components integrated and the qualities of their batteries, that require certain care minimum for guarantee its stability and avoid episodes unpleasant with burns of first or second grade.
However, this type of news should take with caution, since usually the details surrounding the event are few and triggers factors remain fuzzy. Such is the case of a recent report, published in Tiéba (via Phone Arena), in where someone went up photographs where ensures having suffered the explosion of its new Galaxy Note 7 after charging your battery:
Galaxy Note 7 explodes
The images show the terminal completely fried, and according to what little that is described in the publication, the explosion would have detonated by using an adapter for USB-C to Mini USB, which was connected to a charger. Apparently the adapter or the charger not were original or corresponding to the specifications of the Galaxy Note 7, although not is known with certainty.
Under any scenario the obvious recommendation is to use the wall charger and the official adapters integrated with each Galaxy Note 7, avoiding the use of apocryphal adapters that put at risk the smartphone and the physical integrity of the user.
