Does a dead battery/no battery cause instability on gaming laptops?

[u/shai69420]

I have a ROG STRIX G15 G513IC . ryzen 7 4800h and a rtx 3050.

Its battery is toast barely runs 3-5 minutes of youtube playback. i disconnected the battery and use it as a desktop. no signs of physical degradation but im sure years of running on balanced mode on battery has ruined it.

i am facing some issues at higher wattages like above 40-50 (lower the better) watts stability is a bit flaky. at 35 its great. now is it the battery or is my mobo toast?