Then we will remote the battery.

These are 2*M2 screws, or so they are labeled ...

USE PH 1 SCREWDRIVER

Sometimes, it appears that the screws are overtightened, but when the case screws on your laptop started to fall out all over again, it's really not the same argument.

But for the case of battery and speaker, it's really not that necessary. You can loosen them for a bit.