I'm sure, but how are they actually supposed to know that? You unlocked your bootloader, installed something like twrp, and obtained root access to jiggle with anything you want at that point. I used to have a lot of fun doing all that type of stuff, but I knew I voided out my warranty doing it unless I could still roll it back to factory and remove root, first. Not to mention dealing with knox.
I'm sure, but how are they actually supposed to know that? You unlocked your bootloader, installed something like twrp, and obtained root access to jiggle with anything you want at that point. I used to have a lot of fun doing all that type of stuff, but I knew I voided out my warranty doing it unless I could still roll it back to factory and remove root, first. Not to mention dealing with knox.
Except legally the burden is on Samsung to prove you damaged the battery. They don't get to say "oh well you could have done xyz, denied"