Q&A Forum > > Reply To: Battery Health Start a new discussion August 4, 2020 at 1:27 pm #44202 KimKomandoKeymaster @KimKomando Hi there, When your Macbook is plugged in, it will be warmer. It’s charging the battery while running the laptop. So for heat’s sake (not Pete!), I would run it off the battery while watching a movie. Kim 🙂