Overview
- Leaked social posts this week claim the iPhone 18 Pro Max will come with a 5,425 mAh eSIM‑only battery and a 5,235 mAh physical‑SIM variant, numbers reported by multiple tech sites but originating from now‑deleted X/Twitter and Weibo posts.
- The claimed capacities would be meaningful year‑over‑year increases over the iPhone 17 Pro Max and would put the eSIM version above the Galaxy S26 Ultra’s reported 5,000 mAh on paper.
- Reporters note a plausible engineering reason for the split: removing the physical SIM tray frees internal space that can be used for a larger single battery cell.
- Analysts caution that capacity alone does not determine real battery life because runtime also depends on the A20 family chip efficiency, more efficient LTPO+ OLED displays, modem design and Apple’s software tuning.
- The leaks remain unverified and traced to social posts and supply‑chain chatter, with some outlets noting a possible link to a Tata Electronics data breach; final confirmation is expected when Apple announces official specs at its September event.