iPhone Fold battery now rumored to have less capacity than expected

A leaker claims to have the specifications for both of the batteries expected in the iPhone Fold, and the suggestion is that despite its thin chassis, it will have all-day battery life.

A leak in February 2026 claimed that the iPhone Fold would have the largest-capacity battery of any iPhone ever, but stopped short of any specifics. Around the same time, a separate rumor said that capacity would be 5,000 mAh, and the battery would have two cells that are "3D stacked."

Now leaker Digital Chat Station has posted on the Chinese social media site Weibo that the iPhone Fold will have a battery capacity of at least 4,883 mAh. This figure is said to have come from regulatory filings made by an unspecified battery supplier.

These filings also reportedly specify that the iPhone Fold will have two batteries, one with a capacity of 1,921 mAh, and the other with 2,962 mAh.

Previous rumors put the forthcoming iPhone 18 Pro at a battery capacity of 4,288 mAh. If all of these figures are correct, then that means the iPhone Fold will have a battery capacity that's approximately 14% greater than the iPhone 18 Pro.

At the same time, the leaker reports that the supply chain is predicting a total battery capacity of between 4,800 mAh and 5,000 mAh. The odd thing about this is that the supply chain should surely know the capacity by now, especially if the battery supplier has been filing details of them.

Apple has been striving to improve battery life overall, but especially since it began planning the thinner iPhone Air. The iPhone Fold has to be particularly thin when it is opened, but then it will be comprised of two halves.

Given the need for long battery life and that the two sides should have the room, it's surely obvious that the iPhone Fold will have two batteries. The two stated capacities suggest that one side of the fold will contain the motherboard, while the other will have space for the larger of the two batteries.

Although there was previously an Apple patent covering the design of one single battery that could fold.

Note that Digital Chat Station does have a reasonably strong track record in Apple leaks. Plus the claimed capacity of 4,883 mAh does fit with previous rumors.