Is it bad to leave Steam Deck plugged in overnight?
While it is FAR BETTER than simply leaving it at 100% and charging 24/7, it is still not a good idea to leave it plugged in if you are not going to use it. Needless wear and tear. 3- You can get a lot more than 1 1/2 hours of life out of the batteries, even in demanding titles if you mess with the settings.