Have an iPhone 6? Apple offers free battery replacement for phones that abruptly shut down

Apple is offering free replacement batteries to some iPhone 6 users whose phones abruptly shut down for no apparent reason.

Apple said in a statement Monday, November 21st that "a very small number" of devices made between September and October of 2015 are affected.

The tech giant's announcement came less than a week after a consumer watch group in China launched an investigation into the problem.

The China Consumers Association said in a statement "a considerable number of Chinese iPhone 6 and 6S users reported the problem."

Apple said it's not a safety issue.