iOS 27 Code References iPhone With Two Batteries - MacRumors

What the report says

MacRumors reports that Apple’s fourth developer beta of iOS 27 contains Battery Health language that appears to anticipate an iPhone with more than one internal battery. The site says the finding was first noted by Macworld and that MacRumors verified the references in the beta. The strings use plural wording for battery status and service messages, a change from current iPhone Settings text that refers to a single battery.

The discovery has prompted speculation that the code relates to Apple’s long-rumored foldable iPhone, which MacRumors refers to as the “iPhone Ultra.” Macworld suggested the plural battery language could be designed for that device. MacRumors also cites prior rumors that the model may use two battery cells with capacities of 1,921mAh and 2,962mAh, for a combined 4,883mAh.

The report notes that foldable phones commonly divide battery capacity across the two halves of the device, which would make a dual-cell iPhone design plausible. MacRumors further suggests the wording could indicate Apple plans to identify or service the cells separately, potentially allowing one degraded or unverifiable battery to be replaced without replacing both.

Apple has not announced a foldable iPhone in the cited article, and software strings in beta releases do not confirm final hardware plans. Still, the reference is notable because operating-system code can sometimes reveal support for upcoming devices or service workflows before products are introduced. MacRumors says the expected launch window for the rumored iPhone Ultra is September, alongside iPhone 18 Pro models.