After recent shares crash Samsung to start sales of fresh Galaxy Note 7 smartphones from Sept 28
[Representational Image]Reuters

Leading smartphone-maker Samsung on Monday (January 23) announced the findings of the company's internal inquiry on the Galaxy Note7 catching fire in Seoul.

Following on months of in-depth investigation, Samsung has found defect in the battery assembly as the prime reason for the Galaxy Note7's explosion while charging and sometimes when dropped on the floor.

Also read: Xiaomi Redmi Note 4 vs Redmi Note 3: Is it worth un upgrade?

So, here's what happened inside Galaxy Note7 that caused the battery to burst:

Samsung's own R&D engineers and third party researchers numbering 700 conducted simulation on 200,000 Galaxy Note7 units with 30,000 different batteries and found two factors originating in two different batteries used in Galaxy Note7 models.

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Here's what caused Samsung Galaxy Note7 to catch fire [infographic]Samsung Newsroom

In the first instance, there was electrode deflection, an incorrect positioning of negative electrode tip in the upper right corner of the battery.

Samsung, Galaxy Note7, battery defect, Galaxy Note7 Battery A, defect
Samsung Galaxy Note7 Battery A defect [infographic]Samsung Newsroom

In the second occurrence, an abnormal high-weld burrs on the positive electrode resulted in the penetration of the insulation tape and separator, which then caused a direct contact between the positive tab with the negative electrode, causing the fire.

Samsung, Galaxy Note7, battery, defect, Galaxy Note7 battery B defect
Samsung Galaxy Note7 Battery B defect [Infographic]Samsung Newsroom

Samsung sets up new and enhanced quality-assurance measures to improve product safety

Having learnt valuable lessons from Galaxy Note7's battery defect, Samsung has decided to set up a broad range of internal quality and safety measures to improve the product safety, including 8-Point Battery Safety Check (BSC) and additional protocols like multi-layer safety measures.

Further, Samsung has also formed a Battery Advisory Group consisting of external advisers, academic and research experts to ensure that the company maintains a clear and objective perspective on battery safety and innovation.

Here's Samsung official video detailing company's findings on Galaxy Note7 investigation:

Here’s what caused Samsung Galaxy Note7 to catch fire.Samsung Newsroom via YouTube

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