iPhone Ultra Battery Capacity Revealed
Leaks Detail iPhone Ultra Foldable Battery: Two Cells Totaling 4,883 mAh
Key Points
Industry benchmarks show rival foldables with different capacities: Samsung Galaxy Z Fold7 at 4,400 mAh, Google Pixel 10 Pro Fold at 5,015 mAh, and Pixel 9 Pro Fold at 4,650 mAh.
The standard non-folding iPhone models are expected to carry about 4,288 mAh, making the foldable's near-4,900 mAh total appear relatively stronger compared with traditional designs.
Regulatory filings and supply-chain chatter point to a broader projected total of 4,800–5,000 mAh for the foldable's battery, even as a precise 4,883 mAh figure circulates.
Leaks suggest the two-battery layout implies one half of the foldable houses the motherboard, with the other half allocated for the larger cell.
Notebookcheck notes regional battery ratings for the iPhone 18 Pro Max (5,235 mAh in Europe; 5,425 mAh in the US) and reports that the Ultra’s filings show 4,883 mAh, fueling talk that Apple may market the pack as 5,000 mAh.
Apple's foldable iPhone Ultra will pack two separate battery cells totaling 4,883 mAh, according to new regulatory filings from Apple's battery supplier, 9to5Mac reports. The split design uses one 1,921 mAh cell and one 2,962 mAh cell — far below earlier rumors that predicted a 5,800 mAh flagship battery.
The figure still puts the foldable well ahead of standard iPhone models. The iPhone 18 lineup is expected to carry roughly 4,288 mAh, making the Ultra's near-4,900 mAh total look competitive, iClarified notes.
Two Cells, One Phone: How the Battery Split Works
The foldable's two-battery layout is driven by its form factor. 9to5Mac reports that one half of the phone houses the motherboard, leaving the other half free for the larger 2,962 mAh cell. The smaller 1,921 mAh cell fills the remaining space on the motherboard side.
iThinkDiff notes that regulatory filings point to a total capacity range of 4,800–5,000 mAh. Apple may even market the battery as 5,000 mAh, rounding up from the 4,883 mAh figure in the filings.
Smaller Than Expected, But Still Bigger Than Rivals
Early leaks had set high hopes. Some rumors suggested 5,000–5,800 mAh. The 4,883 mAh figure is a step down, Mac Observer reports, calling it a battery that "falls short of massive rumors."
But the numbers still hold up against the competition. The Samsung Galaxy Z Fold 7 ships with 4,400 mAh. The Google Pixel 9 Pro Fold carries 4,650 mAh. Only the Pixel 10 Pro Fold edges ahead at 5,015 mAh, according to The Shortcut.
How the Ultra Compares to Apple's Own Pro Max
Notebookcheck adds useful context from other Apple filings. The iPhone 18 Pro Max is listed at 5,235 mAh in Europe and 5,425 mAh in the US. That makes the Ultra's 4,883 mAh notably smaller than Apple's own top-tier non-folding phone.
Still, observers say real-world battery life is about more than raw capacity. Apple's software efficiency and chip optimizations could close the gap. The Shortcut says the design hints at "all-day endurance" despite the foldable's physical constraints.
September Launch Looms as Battery Story Stays Fluid
Apple is expected to announce the foldable iPhone Ultra in September alongside the iPhone 18 Pro. The battery details are still based on supplier filings and supply-chain leaks — not confirmed specs, iClarified cautions.
The mix of regulatory data and speculation continues to shape expectations. Final battery performance will depend on the hardware configuration Apple ships and how well iOS manages power across two cells — questions that won't be answered until launch day.
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