A few days ago Samsung announced that they would be using the same battery supplier that supplied batteries for the Chinese versions of the Note 7. Early this morning reports of exploding Note 7 devices in China started to roll in. The initial worry was that somehow Samsung's new battery supplier had somehow goofed up as well. An investigation was quickly launched, and it was determined that the batteries were not to blame for the Note 7 fires in China.
-AmperexBased on the burn marks on the specimens, we inferred that the source of the heat came from outside the battery itself. There is a large probability that other outside factors were the cause of the heating problem.
For now there is no explanation of what is causing the Chinese version of the device to catch fire. It does however to be a completely different problem than what we have seen with US and other variants of the Note 7.
via WSJ