Apple has not introduced the iPhone Ultra yet, but one of its most important details may already be taking shape. A new battery leak suggests the company’s first foldable could arrive with a power setup that edges ahead of a key rival on paper.
The report points to two certified battery units from an Apple supplier, a design choice that fits the demands of a foldable phone. Digital Chat Station shared the information on Weibo, and the details were later cited by beritasatu.com.
Two batteries, nearly 5,000 mAh combined
Foldable devices often rely on two separate batteries because of the hinge and body structure. In this case, the leaked rated capacities are 1,921 mAh and 2,962 mAh, which add up to 4,883 mAh.
| Battery Unit | Rated Capacity | Combined Total |
|---|---|---|
| Battery 1 | 1,921 mAh | 4,883 mAh |
| Battery 2 | 2,962 mAh |
Because typical capacity is usually a little higher than rated capacity, the iPhone Ultra is expected to be sold with a battery capacity of around 5,000 mAh. That would place it in a strong position for a foldable model, especially if battery life becomes one of Apple’s main priorities.
Samsung’s rival lands slightly lower
The timing matters because the Samsung Galaxy Z Fold 8 is being discussed as the direct competitor to the iPhone Ultra. That device is said to carry a 4,800 mAh battery, giving Apple a small theoretical lead in raw battery capacity.
The gap is not dramatic, but it is still notable for a category where endurance and internal layout are both difficult to balance. For buyers comparing foldables, a near-5,000 mAh figure could become one of the first spec-sheet advantages Apple can point to.
Set for a September 2026 launch window
Apple is expected to unveil the iPhone Ultra alongside the iPhone 18 Pro and iPhone 18 Pro Max at its annual September 2026 event. Earlier reports had suggested the foldable might be delayed, but the latest information says Apple is still on track for the planned schedule.
If that timeline holds, the iPhone Ultra will enter the spotlight with the rest of the iPhone 18 series. The battery leak suggests Apple is preparing a foldable that leans heavily on endurance, not just on the novelty of a new form factor.