Apple may be getting closer to launching its first foldable iPhone. The latest iOS 27 beta has reportedly revealed new clues about the rumored device. Apple has released the fourth developer beta of iOS 27. According to the source, the update contains code strings that mention an iPhone with multiple batteries.
The references appear in the Battery Health section of iOS 27 Beta 4. One string says, “The batteries in this iPhone are performing as expected.”
Another message warns that “the health of the batteries in this iPhone has significantly degraded.” A third reference mentions “one of the batteries” being detected as a non-genuine Apple part.
These references are notable because Apple has never released an iPhone with multiple batteries. However, the rumored foldable iPhone could use a dual-battery setup because of its unique design.
The foldable iPhone is widely expected to launch under the iPhone Ultra name. Rumors have also suggested that Apple could use two batteries to better fit the device’s foldable form factor.
The latest discovery is not the first sign of a foldable iPhone in Apple’s software. Similar references to the rumored device were also found in the first iOS 27 developer beta. For now, Apple has not confirmed the existence of a foldable iPhone. Still, the repeated software references suggest that the company may be preparing its software for new hardware.
The iOS 27 Beta 4 code does not confirm when the foldable iPhone will arrive. It also does not reveal how Apple’s rumored dual-battery system will work. However, the references add more weight to growing reports about Apple’s plans for a foldable device. If the rumors are accurate, the iPhone Ultra could become one of Apple’s biggest hardware launches.

