Apple's much anticipated 5.5-inch iPhone 6 will be delayed as the company struggles to find a sufficient battery to fit the phones ultra-thin design, MacRumors reported Tuesday, citing Taiwan's Industrial and Commercial Times.
The device, nicknamed "iPhone Air" by industry insiders, will be released sometime in 2015, the report said. Sources with knowledge of the matter previously reported the phone would be released in September.
According to Tuesday's report, Apple is looking for a battery that measures 2 mm or less in thickness versus the industry standard of 2.8 mm to 2.9 mm.
In addition to a larger screen with a higher resolution, the next generation of the iPhone is rumored to feature a faster processor, a Touch ID fingerprint sensor and an upgraded camera with optical image stabilization.
Apple did not immediately respond to CNBC's request for comment.
Click here to read the full report from MacRumors.