Blade Advance 15 randomly turning off

Hi guys, like quite a few other people I had to remove the battery from my 2019 razer blade adv due to swelling. I'm now running without a battery but with heavy game usage the notebook has started to switch off unexpectedly. It looks like it has become more frequent in the latest weeks, and I have narrowed down the cause to a few things: 1) not enough power coming from the brick during high CPU/GPU usage, which causes a sudden switch off due to the battery missing as a backup in case of a peak. 2) a thermal issue: possibly either the CPU or GPU overheating. 3) a windows update 4) a combination of all of the three above. It could very well be a system update which caused a slight increase in CPU usage and therefore (1), or the system overheating certain components as now all of the power needs to come from the power connector rather than being split evenly between battery and brick. Has anyone experienced anything similar? Did anyone had a good experience in replacing the battery? Does anyone have any type of battery to recommend?