Due to the large dimensions of the case, some things Apple engineers implemented in the iPhone 12 Pro Max a little differently compared to how it was done in the iPhone 12 and 12 Pro. However, the main change affected the rear camera. The resolution of its main module remained 12 megapixels, but the size of pixels and matrices increased. The sensor is 47% larger than the Pro version, which allows it to capture more light for better low-light performance.

The matrix shift stabilization system, used instead of optical stabilization, also played a role. During system operation, the sensor moves thousands of times per second, and for this, it also needs space. In addition, some space is required to accommodate the four magnets that provide these movements.

Among other features of the interior decoration of the iPhone 12 Pro Max, experts from iFixit noted the L-shaped battery. A similar solution was used in the predecessor iPhone 11 Pro Max, while the iPhone 12 and 12 Pro received regular rectangular batteries.

But the battery capacity of the iPhone 12 Pro Max was the largest among the entire twelfth family – 14.13 Wh. For comparison: for the iPhone 12 and 12 Pro, this figure is 10.78 Wh, for the iPhone 12 Mini – 8.57 Wh. However, the iPhone 11 Pro Max has a larger battery – 15.04 Wh.

Most of the key internals in the iPhone 12 Pro Max is the same as in the lower-end models, although the motherboard design is different. In addition, the spacious body made it possible to install a larger and, accordingly, more powerful Taptic Engine vibration motor and speaker into the smartphone.

For maintainability, the iPhone 12 Pro Max received a score of 6 out of 10. Experts noted the ease of replacing the display and battery, as well as the modularity of most of the components. The smartphone could have gotten a higher score if not for the use of custom screws, water-resistance, and the need to replace the entire case to replace the broken glass of the back panel.