If anyone with any insight on this could help, I'm sure all of us would be very grateful. I've done everything on the internet from drivers to rewriting the bios and nothing seems to help which makes me believe it is damaging or shorting something on the motherboard when the battery damage happens. (I tried an oem battery just to see if there was a difference but there wasn't - oem worked as well.) In this case, the bad battery would quickly switch from '0% charging' to '100% charged' with the bad battery. I had one pro 4 that the battery just went bad internally, swapped it with an aftermarket battery and all was good. I can adjust my brightness settings but not the power settings. The pro 4 will usually say 'plugged in, charging' or 'charged' with an accurate battery percentage. I have tried 3 different suppliers (although the packaging is almost identical to one another) and none have repaired any pro 4's with the swollen or physically damaged battery.
To run the battery report, kindly type Command Prompt on the search box next to the Windows icon and run it as administrator. Every pro 4 that I've come across (over 20 units with this issue) that has had a battery 'go bad' by swelling or physical damage was not repaired by a brand new aftermarket (or oem used) battery. If it's updated and you encounter this issue, what I can highly recommend is to run the battery report for us to check whether or not the battery life of your Surface device has depreciated. Unfortunately, I don't believe it's the battery. Sorry, I don't have a solution but some info may help.
