The iPhone 18 Pro Max could get a much larger battery than the regular iPhone 18 Pro, based on new Chinese regulatory filings shared online. The leaked numbers suggest Apple plans to give its larger Pro model a stronger battery advantage this year, while the smaller Pro model receives only a minor capacity increase.
Digital Chat Station shared the battery details on Weibo, and the figures point to a clear gap between the two models.
| Model | U.S. Battery | China Battery |
|---|---|---|
| iPhone 18 Pro | 4,288mAh | 4,056mAh |
| iPhone 17 Pro | 4,252mAh | 3,988mAh |
| iPhone 18 Pro Max | 5,567mAh | 5,391mAh |
| iPhone 17 Pro Max | 5,088mAh | 4,823mAh |
The iPhone 18 Pro Max shows a jump of nearly 10 percent over the iPhone 17 Pro Max, while the iPhone 18 Pro barely changes from last year’s model. This difference matters because Apple already gives the Pro Max better battery life due to its larger size.
The U.S. models appear to have larger batteries because Apple uses eSIM-only designs there, which removes the physical SIM tray and creates more internal space.
Apple is expected to launch the iPhone 18 Pro and iPhone 18 Pro Max in September. Both phones should share many major features, including the rumored variable aperture main camera, but battery life now looks like the biggest reason to choose the Pro Max.
