At a special press conference, representatives of the South Korean company Samsung announced that the cause of the explosion of the flagship Galaxy Note 7 smartphones was a manufacturing defect in the battery design. It was revealed that Samsung SDI batteries exploded much more often than those made by Amperex Technology Ltd. For some reason, the native batteries turned out to be slightly larger in size than required. Inside the smartphone case, they became cramped, they were deformed, which led to a short circuit between the internal electronic components of the battery. The result is overheating and subsequent fire. Another vendor did not have a miscalculation in the dimensions of the battery, however, the need to speed up the production of the component parts for Note 7 led to a defect during assembly at the factory. As a result, the defect in these batteries also caused spontaneous combustion of smartphones. This year Samsung will regain confidence in its flagships, in particular, the next model of the Note line. The manufacturer intends to pay more attention to battery production, and also plans to make significant changes to the battery testing process to prevent a repeat of the story.