Samsung Galaxy Note 7 Worldwide Recall After Batteries Catch Fire
What happened
Samsung recalled its Galaxy Note 7 flagship smartphone worldwide in October 2016 after batteries spontaneously caught fire during charging. The initial partial recall failed — replacement devices also caught fire. Samsung permanently discontinued the model and issued a full global recall affecting roughly 2.5 million units. Airlines worldwide banned the device from all flights. Total losses exceeded $5.3 billion.[1]
What went wrong
Samsung pushed battery energy density beyond safe limits to hit aggressive marketing specs, leaving insufficient tolerance between battery layers. An aggressive curved-battery manufacturing process introduced microscopic defects in the separator film — a thin membrane preventing internal short circuits — which failed under normal charging conditions. The replacement units were rushed through a second supplier without resolving the root cause.[1]
Lesson learned
Hardware safety margins cannot be sacrificed to win spec benchmarks. When the first recall replacement units also caught fire, the only acceptable response was immediate production halt — attempting a second fix without diagnosing root cause compounded the reputational damage far beyond the original incident.