IntelliTechs · Oct 19, 2026
If battery life is why you're eyeing the iPhone Duo, the numbers look good: a rated 51.5 hours per charge and more capacity than the Galaxy Z Fold 8.
Apple posted the document on October 16, the same day pre-orders opened. Until then, the battery size existed only as a leak.
MacRumors cites an iFixit teardown for two other iPhones: the iPhone 18 Pro at 4,288 mAh and the iPhone 18 Pro Max at 5,567 mAh.
In practice, 51 hours per cycle suggests you should get past a day and a half of moderate use between charges, which is welcome on a phone with a 7.6-inch inner display and a 5.4-inch outer…
Pre-orders opened October 16 and deliveries start October 23. In the US the iPhone Duo starts at $1,999 for 256GB, as we covered in our iPhone Duo pre-order breakdown.
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