For those concerned, in summary, I managed to solve the issue with a new battery replacement after running a few tests. Apparently, the community here is not very active, especially if your warranty has ended. I found a solution by searching online on various websites, forums, and asking around offline.
 

I'm sad to say that if you are in Malaysia, where there are only flagship stores but no support, you have to figure things out yourself and put your faith into e-commerce shops to buy OEM components (such as a battery in my case). If you go to offline stores, they will charge you double to triple the price for ordering OEM parts (which is not wrong, as that's their business if you don't know how to buy stuff online).
 

I hope I provided a little help in this community, so if you encounter the same problem, check your battery report, charger, how it occurs, and open up your device to check if it's clean and if your battery is working fine. (Yes, I did not include formatting or reinstalling; some people might say it's a software problem, but that's after you check your battery report).

Thanks for reading and good luck fixing your Blade 15 or Razer laptop.

Hi, im pretty sure i have same issue, did you ever try use the laptop without the battery?

I dont have enought money for another battery so i was thinking in this as a posible solution
 

No, I didn’t try it without the laptop battery. While it's technically feasible, unstable electric surges could potentially harm the laptop. But if you battery is swelling, is best to remove immediately, is worst if you use a swelling battery.