Arch Linux crashing (brutal shutdown) when opening/closing windows and logging in while on battery

The title sums it up pretty well. My computer has been shutting down during certain activities when on battery after I install Artix Linux, and still does it after I uninstalled that and installed Arch. I have been looking for a fix, but can't find anything. It tends to shut down during login (not as often) or when opening and closing my web browser (Brave) (more often), but very rarely also when opening a window, but never when I just leave it alone. When it crashes after closing the web browser, there is a perceivable moment before it actually crashes, so it's not immediate as far as I can t

Question by Thomas VanCleave on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.