Apple has released a statement saying that the unexpected shutdown issue for iPhone 6S’s reported last week may be more widespread than originally thought.
The issue is caused by a faulty battery component which results in some iPhone 6S batteries degrading faster than usual. As a result, many users noticed their iPhone 6S randomly powering off at twenty percent or thirty percent battery levels.
Last week, Apple announced a battery replacement program for all affected devices. Users could enter their serial number online to check if their device was eligible.
After the release of the following statement from Apple, it has become apparent that more devices may be suffering the same fate:
Outside the affected batch, a small number of customers reported an unexpected shutdown. Some of these shutdowns may be normal, because the iPhone will shut down to protect its electronic components. To gather more information, we will add an additional diagnostic feature to the iOS software update that is released next week. This feature collects a variety of information in the coming weeks that may help us improve algorithms for managing battery performance and shutdown operations. If such improvements can be achieved, we will deliver them through further software updates.
Apple will be releasing a software update to try and fix the issue. Other users have up to three years from purchase date to benefit from the free battery replacement program.