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I read about the two incidents you are probably referring to. In both cases, it seems that counterfeit or aftermarket chargers were being used. Now, keep in mind, this is China, where mothers are afraid to use domestically produced baby formula because it has been dangerously adulterated so many times in the past, and has actually killed babies. It’s not really all that surprising that there would also be unsafe electrical components there. Use an OEM or reputable charger and don’t sweat it.