Apple appears to be shifting its strategy with the upcoming iPhone 18 Pro and iPhone 18 Pro Max. New regulatory filings from China’s 3C certification database reveal that the Pro Max will receive a significantly larger battery upgrade compared to its smaller sibling, giving the two models a more meaningful difference beyond just screen size.
Battery Capacities Leaked
According to details shared by prolific Weibo leaker Digital Chat Station, here’s what the filings show:
iPhone 18 Pro
• China (physical SIM): 4,056 mAh (up from 3,988 mAh in the iPhone 17 Pro)
• United States (eSIM-only): 4,288 mAh (up from 4,252 mAh in the iPhone 17 Pro)
This represents only a minimal increase of roughly 0.8–1.7% year-over-year.
iPhone 18 Pro Max
• China (physical SIM): 5,391 mAh (up from 4,823 mAh in the iPhone 17 Pro Max)
• United States (eSIM-only): 5,567 mAh (up from 5,088 mAh in the iPhone 17 Pro Max)
That’s a substantial jump of approximately 9.4–11.8%, depending on the region.
The Pro Max battery is nearly 30% larger than the standard Pro model — a gap that should translate into noticeably better endurance on Apple’s flagship phone.
Why This Matters
For years, the main differences between the iPhone Pro and Pro Max have been limited to display size, battery life (thanks to the larger chassis), and minor weight variations. Apple has occasionally given the Pro Max exclusive advantages (such as the 120Hz ProMotion display on earlier models before it trickled down), but this year’s leak suggests a more deliberate push to differentiate the two.
The significantly larger battery in the iPhone 18 Pro Max reinforces its position as the flagship for users who prioritize maximum battery life and screen real estate. Meanwhile, the standard Pro gets only a token bump, keeping it more compact and potentially more affordable.
The Pro Max is also expected to be slightly thicker to accommodate the bigger cell, which aligns with previous rumors about design adjustments for battery space.
Other Features Expected to Stay the Same
These filings focus solely on battery capacities. Other key specs — including the camera system (likely the same 48MP Fusion main camera with variable aperture on both models), display technology, and processor — are still expected to be identical between the Pro and Pro Max.
Takeaway
If these numbers hold up, the iPhone 18 Pro Max could deliver one of the biggest battery improvements in recent years for Apple’s flagship line, while the regular Pro stays relatively conservative on capacity. This approach gives buyers a clearer reason to choose the larger model if battery life is a top priority.
MacDailyNews Take: Of course, these are still early leaks based on regulatory documents rather than final hardware testing. Real-world battery life will also depend on the efficiency of the new A-series chip, display optimizations, and software features coming in iOS 19.
The iPhone 18 series is expected to launch in September 2026. Until then, expect more details to emerge as supply chain information and additional certifications surface.
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