The company identified the batteries made by Samsung SDI as the cause of these explosions and decided to recall all 2.5 million Galaxy Note 7 units that were shipped to retail partners and consumers. Samsung has been fairly open throughout this process, but the company never really explained what exactly is causing its Note 7 batteries to explode.
In Samsung's Q&A section on its UK news portal, they explained what the issue is really all about.
"Based on our investigation, we learned that there was an issue with the battery cell," Samsung explained. "An overheating of the battery cell occurred when the anode-to-cathode came into contact which is a very rare manufacturing process error."
There you have it. It's not a detailed description of what happens, but if the anode and cathode come into direct contact, the results are not good.
The company also said that this is a problem with the battery cell and it has nothing to do with the device. Furthermore, the problem only affects the Galaxy Note 7, and it doesn’t affect other Samsung phones. "This is only limited to the Galaxy Note 7. Each model has a different design and manufacturing process," Samsung said.
What Samsung failed to clarify is the company responsible for the entire mess. Some say that Samsung SDI is to blame for the exploding Galaxy Note 7 batteries, but Samsung would not confirm that.
"In order to meet market demands, we are working with multiple suppliers," Samsung said. "Unfortunately, we will not be able to confirm this as we work with several suppliers. We are currently working with all of them to protect our customers’ safety first and foremost."