In what turned out to be the biggest blemish in the world's number one smartphone manufacturer's reputation, millions of Galaxy Note 7s from customers are making their way back to the manufacturer for a replacement. While this move may cost Samsung more than a billion US dollars, they had to take the initiative after 35 smartphones around the world blew up while being charged. Samsung has finally provided an explanation behind the exploding Samsung SDI batteries just recently and here is what they said in their official statement
"based on our investigation, we learned that there was an issue with the battery cell. An overheating of the battery cell occurred when the anode-to-cathode came into contact which is a very rare manufacturing process error"
Lithium itself is a reactive chemical and the truth is that any smartphone powered by a Li-ion battery does have the potential to explode or catch fire, if there's a short circuit. In case of the Note 7's battery however, some of the batteries provided by Samsung SDI had an inherent manufacturing flaw which resulted in overheating. The overheating led to multiple Li-ion cells cracking open, causing a thermal runaway. So if you have already bought a Note 7, it's time to take it back to the South Korean OEM!