MacBook Air battery health problem

I bought my MacBook Air m2 in 2022 October and its battery health broke down and it even dropped at %91 at the august in the same year. So it was changed in september and everything was going okay as batterys health but suddenly in January, after using it as just 4 months, it dropped again, at %99. Meanwhile I bought a drawing pad in December and whenever I use it, my mac's battery health drops it or I think so. My question is: is it just a coincidence or is it related that drawing pad could drop my battery health? Can you help me about that? now my battery health is %94 and I dont wanna use my drawing pad anymore because of that. Sorry for the broken English.