Fitbit has said in a statement that the Flex 2 which has been reported to have exploded did not malfunction. If you've been away from the internet over the last few days you may have missed that a Fitbit customer who owned the Flex 2 had reported the wearable exploded while it was being worn on her wrist. It wasn't known at the time what the cause of the issue was, but it was likely assumed by many that the wearable must have been defective and that the battery overheated. Fitbit's official statement notes that the company has conducted an investigation into the matter just as it said it would do when the initial report about the tracker surfaced just yesterday, and in addition to investigating the tracker Fitbit also said the tracker has been tested by a third-party failure analysis firm who has deemed that the damage to the Flex 2 was caused by external forces.
Fitbit doesn't go into detail about the external forces but that is perhaps because it may not know what external forces caused the damage, just that it wasn't an internal failure of the components. In any case, the statement seeks to soothe current and potential customers of Fitbit that this isn't something that is expected to be a repeat situation.
To build on that peace of mind Fitbit says that no other reports of Flex 2 trackers malfunctioning have come in, so customers should feel at ease that their trackers are likely to simply perform their duties and do nothing else. Although Fitbit has followed through with an investigation into the problem with this particular Flex 2, they also mention that customer safety is a top priority for them and that they follow strict regulations for creating as well as testing their products. Fitbit seems to be doing all that they can to bring peace of mind to their customers which shouldn't be a huge shock, given the issues Samsung had last year with the Galaxy Note 7. Luckily, it appears Flex 2 owners are free and clear to continue using their devices without worry that something like this might happen to their own units.