Follow the step to make your very own raspberry pi computer
Step 1: Parts
Step 2: Cardboard Case
Make you cardboard case( I did 26 cm x 13 cm x 4 cm)
Make holes for raspberry pi, io ports and battery
Step 3: Assembling It
Insert the raspberry pi with the cables. Then zip tie the monitor power and hdmi together. Hook up all the cables and use NOOBs if you don't already have you rasbian. Then boot up rasbian and enjoy!