The China Consumers Association (CCA), which is a Chinese consumer watchdog, demanded that tech giant Apple should replace all defective batteries that were integrated into some of its iPhone models manufactured between September and October 2015.

The CCA said that it has received many complaints from Chinese users claiming that their iPhone 6, iPhone 6 Plus, and iPhone 6s Plus are experiencing sudden shutdown issues. The issue regarding these defective phones was first brought up by the CCA in November. The consumer group said that users have been complaining that their iPhone units suddenly shut down even If there is still 50 or 60 percent of battery left, according to ZDNet.

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The battery problem caused a serious concern for many users, especially in the wake of the recent safety issue that caused some Samsung Note 7 devices to explode for no apparent reason. Apple denied that the problem was the same as the one experienced by Samsung and instead launched a worldwide program to replace batteries for iPhone 6s models manufactured between September and October 2016.

The CCA said that not all iPhone models fall into Apple's exchange plan, especially now that other users complain that they are experiencing the same problem even if their phones were not manufactured on the duration that Apple pointed.

In its letter to Apple, the CCA demanded that the tech giant should "give explanations to consumers in timely manner, facilitate consumers' consultation and appointment, prepare enough components to replace batteries efficiently, and meet consumers' basic needs for normal wireless communication."

Reports claimed that some iPhone users in Beijing said that they have to wait for two weeks in order to be scheduled for a replacement. One Apple store reported that it has received more than 2,000 replacement requests.

TagsCCA, consumer group, iPhone, iphone battery, apple, china consumers association, iphone 6 battery, battery problem