Apple iPhone Ultra Foldable Leaks with 4,883mAh Dual-Cell Battery
A regulatory filing from an Apple battery supplier revealed on July 10, 2026, that the upcoming foldable iPhone Ultra will feature a dual-cell battery with a combined capacity of 4,883mAh. According to Chinese leaker Digital Chat Station and multiple tech outlets, the battery consists of two cells rated at 1,921mAh and 2,962mAh, suggesting Apple may market the device with an approximate 5,000mAh capacity.
Chinese leaker Digital Chat Station first shared the details on Weibo, citing the supplier’s registration documents. Multiple technology news outlets, including MacRumors, 9to5Mac, GSMArena, PhoneArena, and India Today, independently reported the same battery capacities and combined figure, confirming the leak’s consistency across sources.
The dual-cell battery configuration for the foldable iPhone Ultra consists of two individual cells rated at 1,921mAh and 2,962mAh, combining for a minimum rated capacity of 4,883mAh, according to a regulatory filing from an Apple battery supplier revealed on July 10, 2026.
The 4,883mAh figure represents the rated capacity, which several analysts and outlets note could be marketed by Apple as “around 5,000mAh” to reflect typical usage capacity. Supply-chain estimates referenced by Digital Chat Station and MacRumors suggest the total capacity may range between 4,800 and 5,000mAh, indicating the final commercial specification might vary slightly. The filing was submitted recently, with coverage emerging on July 10 and 11, 2026, just weeks before the expected product launch.
The dual-cell design is linked directly to the foldable form factor of the iPhone Ultra. Industry standards for book-style foldables typically use split batteries placed in each half of the device to balance weight and thickness. Reports from MacRumors and Wccftech describe the iPhone Ultra as a book-style foldable with an inner and cover display, aligning with the dual-cell battery layout. The filing’s registration under Apple’s battery supplier is interpreted by sources as intended specifically for this foldable model, not for standard slab-style iPhones.
Battery capacities leaked for other 2026 iPhone 18 series models provide context for the iPhone Ultra’s battery size. According to 9to5Mac and India Today, the iPhone 18 Pro is expected to have a battery capacity of around 4,288mAh for the eSIM variant and 4,056mAh for the physical SIM model. The iPhone 18 Pro Max could reach 5,567mAh (eSIM) or 5,391mAh (physical SIM). The Ultra’s 4,883mAh capacity positions it between the Pro and Pro Max models, offering a mid-range battery size within Apple’s high-end lineup. Wccftech noted that users seeking longer battery runtime may prefer the Pro Max, which has the largest capacity among the trio.
Comparisons with rival foldable smartphones show the iPhone Ultra’s battery capacity is competitive but not class-leading. GSMArena and other outlets compared the 4,883mAh rating with the rumored Samsung Galaxy Z Fold8 Ultra, which reportedly has a similar capacity near 5,000mAh. The Galaxy Z Fold8 (non-Ultra) is said to have a slightly smaller battery around 4,800mAh. Digital Trends observed that the Ultra’s battery would surpass the Galaxy Z Fold 7 in capacity, while The News noted that the iPhone Ultra’s battery “lands between two of its closest competitors rather than leading the category outright.” Analysts described Apple’s approach as focusing on reliability and thermal management rather than maximizing battery size.
The foldable iPhone Ultra is expected to be unveiled in September 2026 alongside the iPhone 18 Pro and iPhone 18 Pro Max, consistent with Apple’s traditional annual event timing. MacRumors cited a report from China Securities Journal via DigiTimes and a supplier source stating that Apple has begun delivering components in small batches for the foldable device, with the project remaining on track for a September debut. IDC projections referenced by MacRumors estimate the Ultra’s average selling price at approximately $2,500, with some storage configurations potentially reaching $3,000, positioning it as a premium flagship device. India Today also highlighted leaks suggesting possible price increases across the iPhone 18 Pro series and described the Ultra as Apple’s most ambitious iPhone to date due to its foldable design and larger battery.
Technical analysis indicates the two registered battery cells correspond to an energy content of roughly 18.8 watt-hours. The dual-cell, split-battery system is standard in book-type foldables, helping distribute weight evenly and manage device thickness across both halves. Reports suggest Apple may leverage power efficiency improvements from its A20 chip and custom C2 modem to optimize battery endurance despite the Ultra’s capacity not being the largest in the segment. However, exact details such as the final marketed capacity, endurance figures, and thermal design remain unconfirmed until Apple releases official specifications.
Coverage across multiple sources consistently emphasizes that while the 4,883mAh dual-cell battery has been registered by an Apple supplier, all related details are subject to change until Apple’s formal announcement and technical documentation are published. The battery filing and associated leaks provide early insight into the foldable iPhone Ultra’s hardware but remain unofficial pre-launch information.
