iOS 27 beta 4 mentions new iPhone model with multi-battery feature - 9to5Mac

What the report says

9to5Mac reported that Apple’s iOS 27 beta 4, released on July 20, includes code references that appear to point to an iPhone model designed with more than one internal battery. The site attributed the finding to Macworld’s Filipe Espósito, who identified new system strings referring to “batteries” in an iPhone, alongside existing wording for single-battery models.

According to 9to5Mac, the discovery may support earlier claims about a forthcoming “iPhone Ultra,” a device the outlet describes as expected to be Apple’s first foldable iPhone. The report notes that Weibo leaker Digital Chat Station previously said the model would use two separate internal batteries, a design approach already seen in some foldable smartphones but not previously used in an iPhone.

The article also cites a regulatory filing saying the two batteries have listed capacities of 1,921mAh and 2,962mAh, for a combined 4,883mAh. 9to5Mac frames the new beta code as further evidence in a broader pattern of iOS 27 references that it says have pointed to a foldable iPhone with multiple displays.

Apple has not confirmed the device or its specifications in the supplied report. If accurate, the references matter because battery layout is a key engineering issue for foldable phones, where components often need to be distributed across two halves of the device. 9to5Mac says the iPhone Ultra is expected to be unveiled in early September, but that timing remains based on the outlet’s reporting rather than an official announcement.