Raspberry Pi 4 Portable Computer

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.XLi