You laptop memory is as important to you as much as your laptop notebook. A lot of people like changing their laptop memory due to reasons such as upgrading, repairs, and so no. Whenever you want to change your laptop memory, always go through the manual first, then follow the necessary instructions, so that you don't spoilt many other components. But here is an important information, you can not change upgrade your laptop memory if you laptop doesn't accept a memory upgrade. Inform an expert in that field before you even think of changing it yourself.
The first procedure i follow whenever i am working on my laptop, or any laptop is removing the battery. I ensure that this is done first, because i do not want to take the risk of damaging more things in the laptop.
The power can come on when you are working on it, so i just try to avoid that by simply removing the battery. If the battery is out, then i can proceed to remove the screws the holds the laptop memory. You will notice that there is a warranty sticker placed on the screws, in order to eliminate the idea of personal removing of the screws. So many people never even know that there is a screw down there, and that makes it safe for users.
So for whatever reason you are getting a laptop memory change, take necessary precautions.
Also bear in mind that laptop memory come in different capacity, depending on the laptop make, and model.