In a message on its website posted last 20 November, the tech titan said the problem affects only "a very small number" of iPhone 6s devices and is "not a safety issue."
According to Apple, the flaw affects devices that were manufactured between September and October 2015, which is when the phone launched. Anyone with an iPhone 6s that's been experiencing the issue is told to visit an Apple Store or one of its authorized outlets to get their phone’s serial number checked to confirm eligibility for a free battery replacement.
For those who have already replaced their iPhone 6s battery because of this specific issue, Apple asks them to get in touch and discuss the possibility of obtaining a refund.
The repair program, which doesn’t appear to be country-specific, comes just a few days after the China Consumers Association asked Apple to look into what appears to be the same issue, although the organization suggested it affects not only the iPhone 6s but the iPhone 6, too. To be clear, the repair program that Apple launched on Sunday covers defective iPhone 6s units only.
This latest repair program follows another one launched by Apple last week in response to the so-called "Touch Disease" issue affecting some iPhone 6 Plus units. The problem causes a flickering gray bar to appear at the top of the display, and can culminate in the touchscreen becoming totally unresponsive.
Apple ran into some criticism for charging US$ 149 for the repair, with the company claiming the problem occurs as a result of the phone being "dropped multiple times on a hard surface and then incurring further stress on the device" rather than any issue with its manufacturing process.