The MacBook touchpad is unstable when the battery is low.

I was given a macbook 12 2015 with a dead battery and a very weak tactile touchpad response, I replaced the battery and after much diagnostics it turned out that the old battery leaked onto the touchpad cable, I degreased everything, but now I am haunted by the same problem with the touchpad, but now it manifests itself only when the laptop is powered by the battery and the lower the charge, the tactile response is worse, can you tell me what to do?

[Re-Titled by Moderator]