RE: XPS 13 8th gen i7 16GB RAM QHD+ Battery Issues 4hrs battery life tops
A brand new system may have an unusually high level of background tasks running simultaneously, such as Windows and other applications checking for and downloading updates, Windows monitoring your usage to optimize technologies such as PreFetch for your usage patterns, etc. You might want to conduct a battery test after things have settled in a bit more. The QHD+ display takes 2-3 hours off of the expected battery life, but you should still get 7-8 hours under normal use. Then again, if you're heavy on WiFi and max out display brightness, you'll get less than that. The fact that the fans are kicking on also suggests there's an unusually high level of background activity running, so check Task Manager to see if you can find out what's responsible for that.