Samsung concludes Note 7 investigation and reveals results

Samsung doesn't spare us the details


Earlier this morning, Samsung held a press conference to finally offer the results of its Galaxy Note 7 investigation. Samsung Electronics today announced the cause of the Note7 incidents and measures to prevent a recurrence during a press conference held in Seoul, Korea. DJ Koh, President of Mobile Communications Business, Samsung Electronics, shared detailed results of the investigation and expressed his sincere apology and gratitude to Galaxy Note7 customers, mobile operators, retail and distribution partners and business partners for their patience and continued support.

All findings have also been published on the company’s blog. As with all tech news, rumours had been flying around recently as to what can be expected from these results. The news we got today offers no surprises.



“For the last several months, together with independent industry expert organizations, we conducted thorough investigation to find cause to the Galaxy Note7 incidents.” Koh said, “Today, more than ever, we are committed to earning the trust of our customers through innovation that redefines what is possible in safety, and as a gateway to unlimited possibilities and incredible new experiences.”

The tests

Samsung went through an elaborate testing process of more than 200,000 devices. It focused on feature abnormalities regarding water resistance, quick charging, wireless charging, the iris scanner, software and USB type-C. These internal tests showed no issues. The production process was then scrutinised with third-party investigators’ assistance. The results of these tests concluded that both original and replacement devices were equally affected.

The problem

Original Note 7

The original devices’ batteries had a design flaw that caused abnormalities in their shape. A batteries’ electrodes are separated by a protective layer. The abnormalities in the shape of the battery could damage this layer. A slight shift in the electrodes’ placements can cause a short circuit.

Replacement Note 7

The replacement devices faced the same issue, but were also affected by abnormally high welding bars that formed during the ultra-sonic welding process to attach the positive tab. Due to the high-welding bars, penetration of the insulation tape and the separator resulted in direct contact with the negative electrode. Samsung also found a number of batteries that were missing the insulation tape. All affected devices showed common abnormalities in the same areas, according to one of the third-party investigators: UL. The same investigator claims the root cause was the deformation of the battery along with a thin separator within.


The ultimate takeaway from the Note 7 investigation is what was earlier reported. Samsung tried fitting a large size battery into a frame that was too thin. Hopefully this concludes a bleak chapter for the tech giant and it will take steps to ensure the utmost safety in its devices. An apology was also issued in the press conference. With the Galaxy S8 rumours swirling around, Samsung should hope its customers flock back in the waves they used to.