I wanted to replace the useless storage compartment in the dash with something nicer. I got a housing for a 7 inch Android tablet and put a Huawei T3 in it.
I am running the AutoMate Car Dashboard app on it. I also use a tasker to start/shut down the app and turn on power saving mode based on weather it is getting power from the 12v socket.
The battery stays pretty much at a 100% charge when driving the car daily. If needed I just leave my powerbank plugged in for 1 night and it is fully charged again.
I added a 3€ chinese bluetooth mouse controller so I don't always have to reach for the distant screen.