After months of investigation, the South Korean company Samsung finally identified what have caused the Samsung Galaxy Note 7’s batteries to overheat and catch fire. The results of the analysis have finally been announced officially yesterday in the morning.

Galaxy Note 7 Fires: Why?

We can say that 2016 is a hard time for the world’s biggest smartphone maker since after explosions of Galaxy Note 7 to be reported. Samsung Electronics began to sell its handset globally on August 19 but soon after, the company was forced to stop the sales and started a recall program of all 2.5 million Galaxy Note 7 smartphones, due to fire hazard. This nightmare caused a damage to the manufacturer’s image of $5 billion.

Now, after months of testing more than 200.000 smartphones and 30.000 batteries by 700 experts, Samsung finally announced its findings officially: At a Monday press conference in Seoul the Samsung’s mobile business chief, Dong-jin Koh blamed faulty batteries for the fires of the Samsung Galaxy Note 7, neither the hardware nor the software contributed the fire in any case. At first, Samsung blamed the batteries produced by its own subsidiary Samsung SDI and installed batteries from another producer in their replacement devices. But, these batteries also tended to be explosive.

“Our analysis showed the main cause for the incidents was deflections in the negative electrodes,” he said at the press conference in Seoul. The Samsung Galaxy Note 7 smartphones were packed with lithium-ion batteries, which have three different layers: a positive electrode, a negative one and a third physical layer that should separate these two. When the positive and negative electrodes come in contact, it can sometimes lead to short circuits within the battery cells.

Galaxy Note 7 Fires: It Won’t Happen Again!

Koh also used the conference to apologize to all customers and suppliers for the defective premium smartphones and defects would not happen again. In addition, he said Samsung Electronics has already improved its processes in order to provide safe devices, which includes the implementation of a multi-stage security log in the product planning phase and an eight-point battery safety check.