Apple’s long-rumoured foldable smartphone has appeared in another leak, this time shedding light on one of its most important hardware specifications. A certification spotted by tipster Digital Chat Station suggests the iPhone Ultra could feature a dual-cell battery, offering an early look at how Apple plans to power its first foldable device.
iPhone Ultra battery capacity tipped at nearly 5,000mAh
According to Digital Chat Station, Apple’s battery supplier has certified two battery cells that are believed to belong to the iPhone Ultra. The rated capacities are listed as 1,921mAh and 2,962mAh, resulting in a combined rated capacity of 4,883mAh. Since manufacturers generally advertise the typical capacity instead of the rated figure, the iPhone Ultra is expected to be marketed with a 5,000mAh battery.
A dual-cell battery layout is common in book-style foldable smartphones because it allows battery cells to be placed on either side of the hinge. This helps maintain a balanced design while making efficient use of the available internal space. The leak also indicates that Apple is following the same approach used by other foldable smartphone makers.
The leaked battery capacity puts the iPhone Ultra ahead of the Samsung Galaxy Z Fold 7, which has a 4,400mAh battery. However, it is expected to sit slightly behind Google’s Pixel 10 Pro Fold, which is said to pack a 5,015mAh battery. Interestingly, earlier leaks suggest the upcoming iPhone 18 Pro Max could feature an even larger battery, reportedly exceeding 5,200mAh depending on the market.
Although the battery is smaller than the rumored iPhone 18 Pro Max, battery life will also depend on Apple’s software optimization and the efficiency of its expected A20 Pro chipset, which is tipped to be built on a 2nm process. The iPhone Ultra is currently expected to launch alongside the iPhone 18 Pro series in September, despite earlier reports suggesting a possible delay.