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

Apple released **iOS 27 beta 4** today, introducing software references to a new device hardware configuration. According to reporting from **9to5Mac**, which cites analysis by **Macworld**, the firmware update includes code strings specifically pointing to a **multi-battery feature** designed for an **iPhone Ultra** model utilizing **dual batteries**.

Architecturally, code references for a **multi-battery feature** indicate system-level software handling for multi-cell power management. Operating system support in **iOS 27 beta 4** requires distinct power delivery paths, power state routing, and dual-cell battery management logic rather than managing power through a single battery controller interface.

For engineers and builders, software integration of **dual batteries** alters how operating systems expose battery state telemetry to low-level frameworks. System-level APIs in **iOS 27 beta 4** must handle concurrent charging states, individual cell degradation monitoring, and dynamic load balancing across the **iPhone Ultra** hardware components.

Within the competitive smartphone hardware market, implementing a **multi-battery feature** signals an engineering pivot toward modular internal power distribution. As detailed by **9to5Mac** and **Macworld**, embedding these code references directly into **iOS 27 beta 4** demonstrates that operating system software is being structured to support complex **iPhone Ultra** multi-cell physical architecture.

The practical takeaway for technical teams is to inspect upcoming developer builds and API updates for new battery management references. Developers should monitor operating system documentation for modifications to power reporting classes and system diagnostic tools tied to **dual batteries** in the **iPhone Ultra**.