Apple’s next Pro model is already drawing attention for a change that users will likely notice the moment they hold it. Early leaks suggest the iPhone 18 Pro could become thicker than the iPhone 17 Pro, with most of the added bulk concentrated around the camera area.
That shift appears to be tied to two upgrades Apple may be preparing at the same time: a larger battery and a new chipset. If those details prove accurate, the company would be trading a slimmer profile for more room inside the body, a move that could improve endurance and performance.
Thicker body, familiar aluminum design
Tipster Fixed Focus Digital on Weibo, as cited by Gadgets360, says Apple is expected to keep the aluminum alloy design used on the iPhone 17 Pro. The frame and camera module, however, are said to adopt a thicker profile.
Another leak, reportedly based on supplier images from Tata Electronics, points in the same direction. The device could end up about 2 mm thicker than its predecessor, which would make the change far more noticeable than a routine internal adjustment.
| Model | Thickness | Note |
|---|---|---|
| iPhone 16 Pro | 8.25 mm | Thinner than the next generation |
| iPhone 17 Pro | 8.75 mm | Main comparison point for iPhone 18 Pro |
| iPhone 18 Pro | Estimated about 2 mm thicker | Especially around the camera area |
For context, the iPhone 17 Pro measures 8.75 mm thick, while the iPhone 16 Pro comes in at 8.25 mm. A further increase of around 2 mm would therefore stand out quickly, especially for users who care about hand feel and overall balance.
Camera redesign may explain the extra space
Previous leaks have also indicated that both the iPhone 18 Pro and iPhone 18 Pro Max may be thicker than the iPhone 17 Pro lineup. One likely reason is a redesign of the rear camera system, including the possibility of a variable aperture for the main camera.
If that feature arrives, it would point to more than a cosmetic change. A larger camera module usually means extra room for more complex optical and mechanical parts.
Larger batteries and A20 2nm chip
The iPhone 18 Pro has also appeared in China’s 3C regulatory database with two different battery capacities. The China variant is listed at 4,056 mAh, while the U.S. model is said to carry a 4,288 mAh battery.
On the performance side, the device is expected to use the A20 chipset built on a 2nm process. A larger battery paired with a new chip is a clear explanation for why Apple may accept a thicker device this time.
| Feature | iPhone 18 Pro |
|---|---|
| China battery | 4,056 mAh |
| U.S. battery | 4,288 mAh |
| Chipset | A20 2nm |
| Rear cameras | 48 MP main, 48 MP ultra-wide, 48 MP telephoto |
The rear setup is said to remain a three-camera system, with 48-megapixel sensors for the main, ultra-wide, and telephoto lenses. That suggests Apple is still focused on image quality gains rather than adding more lenses to the back.
iPhone 18 Pro and iPhone 18 Pro Max are expected to launch in September, while the standard iPhone 18 may arrive early the following year alongside the iPhone 18e. For now, the most talked-about change is not a new color or a flashy design shift, but a thicker body built to make room for more battery and upgraded hardware.
