After pre-orders for i Phone Duo opened, Apple uploaded an EU regulatory document revealing the true battery capacity: 4883m Ah. This places the device between the i Phone 18 Pro (4288m Ah) and the i Phone 18 Pro Max (5567m Ah).
i Phone Duo uses two battery cells — one 2962m Ah and another 1921m Ah — combining to total 4883m Ah. Compared to recent i Phone models, only the i Phone 18 Pro Max and i Phone 17 Pro Max offer larger capacities, with 5567m Ah and 5088m Ah respectively.
Apple rates i Phone Duo for up to 44 hours of video playback on the outer display and 31 hours on the inner display. While it has one of the largest battery capacities in an i Phone, frequent use of the larger inside display may reduce overall battery life.
The comparison shows i Phone Duo trailing only the two most recent Pro Max models in raw capacity, making it a strong performer in the high-end segment.
Source: 9to5Mac · Summarized by HeadlinesBriefing