On Sunday Samsung released the details around the failure of its Galaxy Note 7 smartphone. As we know, during the fall of 2016 there were several instances of the phone either catching fire or blowing up as a result of battery flaws.
Samsung said there wasn’t simply one main flaw with the battery, but two. The launch wave batteries had a flaw that centered on a short circuit in the upper right corner of the battery, reports Recode. The specific cause manufacturing-wise in the first batch came out of battery subsidiary Samsung SDI putting out an odd-shaped battery as shown below.
The replacement handsets’ flaw was a welding defect resulting the insulation tape being penetrated by the positive tab. This caused the negative electrode and positive tab to touch. There were also cases of there being no insulation tape which could cause batteries catching fire. This boiled down to rushed production.
The investigation featured 700 Samsung staff members testing 200,000 Galaxy Note 7 handsets and 30,000 additional batteries, and participation from three outside firms.