New 3C certification filings for Apple’s upcoming iPhone 18 Pro and iPhone 18 Pro Max confirm their battery capacity, months before launch. These filings are usually a reliable source since they involve regulatory paperwork.
According to the certification listings, the iPhone 18 Pro is rated at 4056mAh for the China version and 4288mAh for the US version. That’s a modest bump from the iPhone 17 Pro, which came in at 3988mAh in China and 4252mAh in the US. We had earlier reported a nearly identical split for the standard Pro model, based on a leak from tipster Digital Chat Station, so this new filing appears to back up that report.
As for the iPhone 18 Pro Max, the certification reveals a 5391mAh battery for the China version and 5567mAh for the US version, compared to 4823mAh and 5088mAh respectively on the iPhone 17 Pro Max. That works out to an increase of roughly 500mAh.
Chinese phone makers like Xiaomi, Oppo, and OnePlus have long been packing 7,000mAh-plus batteries into their flagships, and Apple has typically leaned on chip efficiency rather than raw capacity to keep up. A jump toward 5,500mAh, paired with the rumored 2nm A20 Pro chip, could help close that gap further.
What else do we know?
Apart from the battery, other parts of the iPhone 18 Pro series have also been the subject of leaks. On the chip side, the phones are expected to use the A20 Pro, Apple’s first chip built on a 2nm process. The design is expected to stay close to the current models; however, the Dynamic Island cutout is likely to be smaller as some Face ID components may hide under the display.
On the camera side, dummy units of the Pro Max suggest the phone could introduce a variable aperture in the main lens that can physically adjust how much light reaches the sensor. The camera setup is rumored to use three 48MP sensors along with a periscope telephoto lens. The screen size will be the same as last year — 6.3 inches for the Pro and 6.9 inches for the Pro Max.
As with the battery numbers, none of these details are officially confirmed, and some may change before the phones are announced. More information is expected to come out as the launch, likely in September, gets closer.
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