Reports on iPhone Duo teardown videos identify two battery cells rated at 2,962 mAh and 1,921 mAh, electrically released adhesive and a modular USB-C component. In a separate JerryRigEverything test, dust buildup around the hinge interfered with closing, and forceful bending produced a green line and touch problems on the inner display. The reported scratch tests also found the inner screen more easily damaged than the outer one. Teardowns illuminate repair access, while destructive tests expose weaknesses under extreme conditions. A single device’s result is neither an everyday failure rate nor equivalent to an official dust-resistance test.