iPhone Duo teardown reveals dual batteries and hinge design

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Just days after Apple’s first foldable phone hit shelves, repair specialists have already cracked it open. Early teardown videos from channels like REWA Technology and Phone Repair Guru show a device that looks nothing like a regular iPhone on the inside. Apple clearly designed this one from the ground up around the folding form factor.

The biggest surprise is the dual-battery setup. There’s one cell in each half of the phone: a larger 2,962 mAh pack and a smaller 1,921 mAh one for a combined 4,883 mAh. Both are held down with electrically activated adhesive. Apply a low charge and the special glue releases, letting technicians lift the steel-cased batteries out cleanly. The phone keeps running if one battery is disconnected.

The logic board is a full redesign. The familiar stacked “sandwich” layout from recent iPhones is gone. The main board is smaller, with the A20 Pro chip sitting right next to 12 GB of RAM and touching a vapor chamber for better heat control under load. A secondary board connects the two halves through a flexible cable. The USB-C port is fully modular and held by just a couple of screws, so swapping it should be relatively straightforward. Rear cameras are also pretty accessible.

Getting to the foldable inner display is a different story. Technicians have to remove both the rear panel and the outer display before they can even reach the batteries and screen assembly. The inner OLED is locked down with a lot of adhesive and connected by delicate ribbon cables that also feed the under-display selfie cameras.

On top of the glossy layer sits a matte nano-textured film that helps hide the crease and cut glare, but it adds another layer of complexity. Replacing the spring-loaded hinge or the inner display itself looks like it’s going to be time-consuming and expensive.

Apple has already put out an official repair manual covering batteries, displays, the hinge, and the Touch ID button. Some parts, like the modular charging port, score well for serviceability. Others are still delicate and costly. Owners are being told to keep a protective case on the phone and seriously consider AppleCare+ or similar coverage, because screen or hinge repairs won’t be cheap.

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(Sources: REWA Technology | Phone Repair Guru)