Overview
- Chinese 3C certification screenshots shared by leakers list the iPhone 18 Pro Max at about 5,391 mAh for China and 5,567 mAh for U.S. units, while the iPhone 18 Pro is shown at roughly 4,056 mAh (China) and 4,288 mAh (U.S.).
- Multiple outlets traced the postings to Weibo leaker Digital Chat Station, making the certification entries the most specific public evidence so far but not an official Apple confirmation.
- The U.S. models appear larger because Apple’s eSIM‑only phones in the U.S. lack a physical SIM tray, which frees internal space that can be used for a bigger battery.
- Reporters and analysts say the Pro Max gain is substantial compared with last year’s model while the smaller Pro sees only a modest rise, a change that may require a thicker or heavier Pro Max chassis to fit the larger cell.
- Earlier supply‑chain leaks, including documents allegedly stolen from a Tata facility, gave different numbers, so final specs and real‑world battery life remain unconfirmed until Apple’s expected September reveal and possible staggered rollout.