Apple iOS 27 beta 4 hints at dual‑battery foldable iPhone Ultra

Apple has released the fourth developer beta of iOS 27, continuing its summer refinement cycle ahead of the September public launch. The build adds incremental improvements such as an Automatic Downloads toggle in the Apple TV app, a “Zoom Photos to Fill” option in Photos, refreshed Siri voice‑selection UI, a new ProRes Log 2 video codec, and per‑network Connectivity Assist that more readily switches to cellular when Wi‑Fi is weak. Several visual tweaks – removal of the beta‑3 notification‑center wallpaper effect, restored white lock‑screen shortcut icons, and a refreshed lock‑screen background blur – were also noted.

Beyond the usual bug‑fixes, the beta’s code contains battery‑health strings that refer to “the batteries in this iPhone,” a departure from the singular wording used on all current iPhone models. Media outlets such as MacWorld and ElNacional reported that the plural phrasing strongly suggests Apple is preparing a foldable iPhone – dubbed iPhone Ultra or iPhone Fold – that would employ two separate battery cells, likely about 1 921 mAh and 2 962 mAh each. Apple has not officially confirmed the device, but the software hint marks the clearest preparation for a dual‑battery architecture to date.