With two months to go before the official September announcement, leaks about Apple's iPhone Ultra are intensifying. Today, a new rumor from Weibo, posted by renowned leaker Digital Chat Station, reveals the battery capacity of Apple's first foldable. According to the post, Apple's battery supplier recently submitted a regulatory filing for two batteries with capacities of 1,921mAh and 2,962mAh, totaling 4,883mAh. This suggests the iPhone Ultra will adopt a two-cell design, similar to foldables from Samsung and Google.
Comparison with Android foldables: Galaxy Z Fold7 and Pixel 10 Pro Fold
The total capacity of 4,883mAh positions the iPhone Ultra competitively against some rivals. The Samsung Galaxy Z Fold7 has a 4,400mAh battery, while the Google Pixel 10 Pro Fold reaches 5,015mAh. The previous Pixel 9 Pro Fold topped at 4,650mAh. Apple appears to have chosen a balanced compromise, relying on software efficiency that historically has allowed its devices to offer superior battery life despite smaller capacities. The dual-cell 4,883mAh setup could translate to excellent endurance, especially when paired with the A19 series chips and a low-power OLED display.
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Implications for charging and slim design
A crucial aspect of any foldable is thickness. Dual-cell batteries occupy more space, but Apple may have optimized internal layout to keep a slim profile. No details on charging speed have emerged yet, but unofficial sources speculate support for fast charging up to 35W, in line with current iPhone 17 Pro models. MagSafe wireless charging could be improved given the larger foldable body. The iPhone Ultra marks Apple's entry into the foldable market, and the battery is just one piece: expect a 7.6-inch inner display and a 6.3-inch outer screen, with a titanium hinge.
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Component leaks like today's often come from the Asian supply chain. A similar phenomenon recently occurred with other products: for example, NVIDIA clarified the Shield TV shortage due to overwhelming demand, and Bixby changed voice after an update. Likewise, regulatory filings are a barometer of production for the iPhone Ultra.
It remains to be seen how Apple will manage real-world battery life. Capacity is just one number: operating system optimization, thermal management, and usage patterns all impact the final result. The official debut is expected in September, alongside the iPhone 18 Pro and iPhone 18 Pro Max. Until then, leaks like this give us a taste of what's to come. For more on foldable technology, you can refer to the Wikipedia page on foldable smartphones.
Source: https://9to5mac.com/2026/07/10/iphone-ultra-battery-details-allegedly-revealed-in-new-leak
