https://wccftech.com/iphone-x-ifixit-teardown/

The iPhone X is not just different when you take a gander at its exterior, but also different from the inside, as an iFixit teardown reveals a lot of things that have changed as it showed off the innards of the flagship.

Apple’s employed talent has a high level of creativity and is able to pack in new features in the very slim form factor of the iPhone X. The teardown performed by iFixit reveals very unique features, such as two batteries instead of a single rectangular cell. Despite the iPhone 8 Plus being bigger in size, it is the iPhone X that sports a bigger battery capacity.