A fresh case of Apple's new iPhone popping open due to a swollen battery has been reported in state media in China, the world's biggest smartphone market where the U.S. firm is seeking to revive faltering sales. From a report: The incident comes as Apple investigates similar cases reported in Taiwan and Japan of batteries in its latest iPhone 8 Plus becoming bloated, causing the device's casing to open. On its website on Thursday, China's state-backed ThePaper.cn cited an iPhone buyer surnamed Liu as saying his newly purchased iPhone 8 Plus arrived cracked open on Oct. 5. There was no sign of scorching or an explosion. Liu told ThePaper he bought the handset through online marketplace of JD.com. He said he did not charge the new device and returned it to the seller. The fresh reports comes on the heels of another story last week where Apple claimed that it was looking into a similar matter.