Released in mid-2012, the Nintendo 3DS XL is the large version of the Nintendo 3DS. On this new version, the console has 2 much larger screens, allowing increased comfort of use and a better 3D rendering. Other than the screens the only real improvement is the battery, slightly increasing the battery life of the console which was already said to be quite bad on the 3DS.
Regarding reparability, there is no real change to the previous generation. This console is still quite easy to disassemble and repair. The easiest part to replace is the battery, requiring only 5 minutes. The screens, like on the previous version, are the most complicated aspect of repairs as the connection cables are not the largest, so repairs and disassembly require precision and care to avoid damaging them.
It's quite easy to identify the Nintendo 3DS XL. Firstly as every Nintendo 3DS features "Nintendo 3DS XL" engraved on its rear panel.
On a design level, the Nintendo 3DS XL has 2 cameras on the back of the top foldable screen.