Overview
- Developers who installed iOS 27 developer beta 4 on Monday found new Battery Health messages that refer to multiple internal batteries rather than a single battery.
- A regulatory filing reported by multiple outlets lists two battery cells of 1,921mAh and 2,962mAh for a combined capacity of 4,883mAh, matching the plural battery wording in the code.
- Earlier iOS 27 beta entries included angle detection and fold‑state code and supply‑chain leaks have long said Apple is working on a foldable 'iPhone Ultra,' so the new battery strings align with those prior signals.
- The Battery Health text specifically mentions one battery failing verification and recommends an Apple Authorized Service Provider replace the batteries, which suggests the cells could be identified and serviced separately and may change repair options and costs for owners.
- Taken together the software strings, supply‑chain reports, and the filing form a strong but still circumstantial case that Apple is preparing a dual‑cell foldable iPhone, and the company has not yet officially confirmed the device or its specs.