This is my Version of a Raspberry Pi 4 Mobile Computer.
1st I've taken and old laptop screen and purchased a HDMI + DVI + VGA LCD Controller Kit from eBay: https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=HDMI+%2B+DVI+%2B+VGA+LCD+Controller+Kit+NT68676+for+LTN121W4-L01+LED+Panel+1280X800&_sacat=0
A step down DC to DC converter to run the Pi 4 since it needs to be a 3 amp power supply. : https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=Car+Waterproof+DC-DC+Converter+12V+Step+Down+to+5V+Power+Supply+Module+3A+15W&_sacat=0 or here: https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=Mini+DC-DC+Step-down+Converter+Adjustable+Power+Module+3.3V+3V+5V+9V+12V+3NJ&_sacat=0
The LCD screen came from an old HP 2730, along with 2 batteries from the same 2730 Laptop.
Any LCD Screen will do as long as you get the correct LCD Controller.
LiPo Balance Charger : https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313.TR12.TRC2.A0.H0.XLiPo+charger.TRS0&_nkw=LiPo+charger&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=Mini+DC-DC+Step-down+Converter+Adjustable+Power+Module+3.3V+3V+5V+9V+12V+3NJ
Extra Cable to charge.

Any way enough from the list of parts there are more but will not post them here.

The Laptop Case is a work in progress and will be updated in the next few months.
This project was to get a portable Raspberry Pi and make it mobile. so far i haven't ran into any problems.

10-9-2019: Ive added new improved 2730 Cases with 30 mm fan mounts and Pi3 or Pi4 location to be added with out cutting out the holes. This new case is only for 2730 Monitors.

I've also added XT60 and JST-XH 3s Balance Connector holes.