Apple has issued a statement vowing to fix a technical issue that has seen some iPhone 6s handsets shutting down unexpectedly.
The tech giant is kicking off a new program to repair what it says is a "very small number" of iPhone 6s handsets that shut down for no apparent reason.
The worldwide iPhone 6s battery-replacement program follows last week's launch of an offer to fix iPhone 6s Plus devices affected by issues referred to as 'touch disease', a bug that surfaces after the phone has been dropped on hard surfaces and results in an unresponsive touchscreen.
In a statement posted on its website, Apple has made it clear that the iPhone 6s battery problem is not a safety issue and only affects a small number of devices that were manufactured between September and October 2015.
"Apple has determined that a very small number of iPhone 6s devices may unexpectedly shut down," said the tech firm in an online statement.
"If you have experienced this issue, please visit an Apple Retail Store or an Apple Authorized Service Provider and have your device's serial number checked to confirm eligibility for a battery replacement, free of charge."
Customers who have already paid for a replacement battery and believe their iPhone 6s was affected by the issue can contact Apple about a refund.
Apple reminds customers to ensure they've backed up data, switched off Find my iPhone, and erased data on their device before returning it for a battery replacement.
Also, customers will need to fix and foot the bill for any unrelated damage, such as a cracked screen, before Apple will replace the battery.
Only the battery replacement itself is free of charge.
The program doesn't extend Apple's standard warranty and only covers iPhone 6s batteries for three years from the first time they were purchased at retail.
The statement also mentioned that Apple may limit the replacement scheme to the country where the handset was purchased.
The unexpected shutdown issue, however, doesn't appear to be limited to any specific region.