iPhone 18 Pro Max rumored to grow slightly thicker, measuring 8.8mm compared to the 8.75mm iPhone 17 Pro Max, per Weibo leaker Ice Universe. This minor increase could boost battery capacity to 5,100–5,200 mAh, up from 5,088 mAh in the iPhone 17 Pro Max, potentially offering longer usage. Screen size remains unchanged at 6.9 inches, aligning with prior reports.

Sources like Digital Chat Station corroborate the weight increase, suggesting the device may surpass 240 grams, making it the heaviest iPhone since the iPhone 14 Pro Max. Analysts speculate this could improve endurance for power users, though Apple’s design philosophy often prioritizes slim profiles.

Beyond battery and dimensions, leakers hint at a smaller Dynamic Island, C2 modem for faster connectivity, and a simplified Camera Control system. The main camera may gain a variable aperture for better low-light performance. No official details exist yet, but these changes align with Apple’s incremental upgrade strategy.

The iPhone 18 Pro Max is expected to debut alongside other 2026 models later this year. While specs remain speculative, the focus on battery and camera upgrades hints at Apple addressing user demands for longevity and photo quality. Whether these tweaks justify a thicker build remains to be seen.