Extremly short battery life and a lot of "warnings / errors" after update

Hi there,

I’ve encountered the following problem: After updating NixOS on my Dell Laptop (Inspiron 14 7425 2-in-1), I now only get around 2 hours of battery life, compared to around 8 hours before the update. Additionally, I’m receiving a lot of error messages (as seen in the picture).

Does anyone have an idea how to fix this?