Apple iPhone 18 Pro and Pro Max’s battery details surface in regulatory filings

Is the iPhone 18 Pro Max Packing a Massive Battery Upgrade?

If you have been keeping an eye on the latest leaks regarding the iPhone 18 series, you might have caught some conflicting reports. Earlier rumors suggested the eSIM-only iPhone 18 Pro Max would feature a 5,425 mAh battery, with the physical SIM version trailing slightly behind. However, fresh data surfacing from China’s 3C database—spotted by the well-known tipster Digital Chat Station—suggests we might be looking at even bigger numbers.

Breaking Down the 3C Certification Data

The new documentation, which appears to detail both the iPhone 18 Pro and the Pro Max, paints a more optimistic picture for power users. Here is how the capacities currently stack up:

iPhone 18 Pro Max (eSIM): 5,567 mAh
iPhone 18 Pro Max (Physical SIM): 5,391 mAh

As you likely know, Apple keeps the eSIM-only experience exclusive to the US market, while the rest of the world—including China—continues to enjoy the convenience of a physical SIM tray. These latest numbers suggest a significant jump over the previous generation: the eSIM iPhone 18 Pro Max could see a boost of 479 mAh compared to the iPhone 17 Pro Max, while the physical SIM model is expected to gain a notable 568 mAh.

What About the Standard Pro Model?

It is not just the Pro Max getting all the attention. The standard iPhone 18 Pro is also slated for a power bump. The eSIM model is tipped to feature a 4,288 mAh battery, while the physical SIM version comes in at 4,056 mAh. When you compare these to the iPhone 17 Pro’s 4,252 mAh (eSIM) and 3,998 mAh (physical) capacities, it is clear that Apple is working to squeeze more endurance into its flagship lineup.

While these filings are as close to official as we get before a launch, it is always wise to remember that battery chemistry and efficiency optimizations matter just as much as raw capacity. Still, if these 3C certifications hold true, the iPhone 18 series could be a major win for those of us tired of reaching for the charger before the day is out.