iPhone Duo battery test: 13h 20m runtime and 60W charging
Tom's Guide tested the iPhone Duo's battery: 13 hours 20 minutes on a 4,883 mAh cell — over three hours longer than the Galaxy Z Fold 8 with a nearly identical capacity, but four hours short of the iPhone 18 Pro Max (17h 31m). With 60W charging, the Duo reached 66% in 30 minutes versus 77% for the 18 Pro Max.
- iPhone Duo lasted 13h 20m with a 4,883 mAh battery
- Galaxy Z Fold 8 with 4,800 mAh managed 10h 06m
- iPhone 18 Pro Max with 5,567 mAh ran 17h 31m
- Duo hit 66% in 30 minutes of charging; 18 Pro Max hit 77%
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