Overview
- Apple's EU energy‑label filing lists the iPhone Duo with a rated capacity of 4,883 mAh made from two cells of 2,962 mAh and 1,921 mAh.
- The Duo is eSIM‑only, so the published battery spec applies to all global units and there is no smaller physical‑SIM variant that would change capacity.
- The EU label also records endurance and durability data, including a 1,000 full‑cycle rating (about 80% capacity retained), an IP68 water rating, and specified drop counts for open and closed poses.
- The 4,883 mAh total sits between Apple’s iPhone 18 Pro and 18 Pro Max and matches or beats some foldables but falls short of high‑capacity rivals, while Apple’s stated charging and playback claims will need lab tests to verify.
- Pre‑orders show strong demand and limited early supply, so confirmed specs will guide buyers weighing pre‑orders against waiting for independent battery and durability reviews.