One of the best definitions for “ultrabook”. However, it lacks some necessities, like an SD card reader, or upgradable memory.
1. Remove the bottom plate
This is one of the easiest notebooks to get inside. You only need to undo 5 Phillips-head screws, which stay attached to the bottom panel by the way, and then you can simply lift the panel away. Hardly needing any prying tools.
The battery is a decent 51Wh unit.
3. Memory and storage
In terms of storage, you only get the aforementioned M.2 PCIe x4 slot, and nothing else. Ultimately, this means that the memory modules are soldered to the motherboard, and the maximum capacity is 16GB of LPDDR3 RAM, working at 2133 MHz.
4. Cooling system
Interestingly enough, Lenovo is using a heat pipe, which is nearly as thick as the M.2 SSD drive.