The smartphone that became a global hazard: Samsung's Galaxy Note 7 disaster explained

Cultures · Published 10 October 2026 Swipe more like this →

In short: Launched in 2016 as a premium phablet, the Samsung Galaxy Note 7 promised innovation but delivered a crisis. After reports of batteries overheating and combusting, the device was recalled twice, banned from flights, and ultimately discontinued. It remains a cautionary tale of manufacturing pressure and the volatility of lithium-ion technology.

Unveiled on 2 August 2016, the Galaxy Note 7 was intended to be Samsung's flagship powerhouse, featuring a dual-sided curved display, iris recognition, and an advanced S Pen. To align its branding with the Galaxy S7, Samsung skipped the '6' in its product line. Despite high demand and positive initial reviews, the device quickly became a liability. By early September 2016, reports of units catching fire or exploding surfaced, leading to an informal recall and a temporary suspension of sales.

The root cause was a manufacturing defect in the batteries. In the original units, batteries from Samsung SDI had a design flaw that made electrodes susceptible to bending, weakening the separation between positive and negative tabs and causing thermal runaway. Samsung attempted to fix the issue by replacing these with batteries from a different supplier, Contemporary Amperex Technology. However, these replacements also failed due to a separate manufacturing defect in the welding process, which pushed electrodes into the separator. Samsung later admitted that this second failure was linked to a push to ramp up production to meet replacement demand.

The fallout was massive. The device was classified as a hazardous material, leading to bans on airlines and public transport. Samsung eventually issued software updates to render the phones unusable by blocking network connectivity and limiting battery capacity. The company projected a 33% drop in operating profits for the third quarter of 2016, with analysts estimating total revenue losses of at least US$17 billion. By 11 October 2016, production was permanently ceased. Samsung later released a refurbished version, the Galaxy Note Fan Edition, in July 2017 with a smaller battery, but the original Note 7 stands as a stark reminder of the risks inherent in modern consumer electronics manufacturing.

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