oct 10, 2016 - Samsung permanently discontinued Samsung Galaxy Note 7 due to CATL battery defect which had caused the device to combust or explode

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Battery defects caused many Note 7 units to overheat and combust or explode.[35][36][37][38][39] On 10 October 2016, Samsung permanently discontinued the Galaxy Note 7 due to these repeated incidents.[40]

In the original run of devices, the battery produced by Samsung SDI[41] contained a design flaw that made electrodes on the top-right of the battery susceptible to bending. This weakened separation between positive and negative tabs of the battery, resulting in thermal runaway and short circuits.[35][36]

Following an official recall on 12 September 2016,[8] the Galaxy Note 7 was re-versioned using batteries from China-based Contemporary Amperex Technology (CATL or ATL), which also supplies batteries to the iPhone smartphones.[41] On 23 January 2017, Samsung stated that these batteries had suffered from a manufacturing defect in the welding process, which pushed electrodes up and caused damage to the separation between the positive and negative tabs. Some batteries were also missing insulation tape entirely. Samsung reported that these oversights resulted from the vendor's push to ramp up production of batteries for the replacement phones in order to meet demand.[35][36]

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