iPhone 18 Pro Max to Feature Increased Thickness and Larger Battery

By: Harsh Vardhan

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Updated on: 10-Jul-2026 06:00 AM

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The upcoming iPhone 18 Pro Max is expected to be thicker and heavier than its predecessor, according to new leaks. The device will reportedly weigh 240 grams and measure 9 millimeters in thickness. In comparison, the current iPhone 17 Pro Max weighs 233 grams and has a thickness of 8.8 millimeters. This marks a modest increase, not as significant as some earlier rumors suggested.

Key Highlights

• iPhone 18 Pro Max expected to weigh 240 grams and be 9 mm thick.
• New model offers a 5,567 mAh battery for eSIM and 5,391 mAh for physical SIM version.
• iPhone 17 Pro Max weighs 233 grams and is 8.8 mm thick for comparison.
• Battery capacity increases over previous generation in both eSIM and physical SIM variants.

Design and Physical Changes

The iPhone 18 Pro Max's increased thickness is likely due to a larger battery. The new model will be slightly heavier and thicker, but the difference is minimal compared to the previous generation. Users who are comfortable with the iPhone 17 Pro Max should not notice a substantial change in hand feel or usability.

Battery Capacity Improvements

The iPhone 18 Pro Max will offer a larger battery than before. The eSIM-only version will feature a 5,567 mAh battery, while the variant with a physical SIM card will have a 5,391 mAh battery. For comparison, the iPhone 17 Pro Max has a 5,088 mAh battery in the eSIM-only model and a 4,823 mAh battery in the physical SIM version. This increase in battery capacity is expected to provide longer usage between charges.

Comparison to Previous Model

The changes in weight and thickness are relatively minor. The iPhone 18 Pro Max adds 7 grams and 0.2 millimeters compared to the iPhone 17 Pro Max. The main improvement comes from the higher battery capacity, which could enhance the device's battery life.

These details are based on recent leaks and may be subject to change before the official launch. Apple has not confirmed these specifications.