Originally Posted by Silverbullet555

I don't have a video to build them. They are super easy once you assemble the parts which can all be had online. There is a fair amount of variability in the components which can be used. And, when it is all said and done, it's still $20-30 USD in components.

You can see in the video how the wiring is. In the video posted, the unit has the resistors glued to the heatsinks built into the fans. That's the most cost effective way to do it. All your resistors will be arranged like railroad ties under railroad tracks. Envision the tracks being your copper wires connecting them all together.

You'll need the resistors. 100W 1 ohm is I think what you need if I remember correctly.
The fans I bought off ebay and amazon. I used a combination of fans built into heatsinks and plain fans to create the unit I wanted.
I opted to add a heatsink to mount the resistors too for more cooling and more stability. Added about $12USD to the project.
You'll need thermal adhesive to glue the resistors to the heatsinks.
Copper wire to make the connections. I used solid for the resistor connections and stranded for the leads.
Banana plugs to connect to the icharger and banana plugs to connect to the power supply to power the fans. I power my fans separately.

Arrange the resistors on the heatsink how you want them. Apply a thin layer of thermal adhesive to each one, place it and press down. By adding the extra heatsink plate, it made gluing the resistors down easy.
Now, run your copper wire from each resistor to the next one. You'll run a strip up each side so they are connected in parallel. Solder on your connector leads. Add your fans either by screwing them to the heatsink or gluing them to the resistors, etc. I prefer 4 fans, 2 blowing on top of the heatsink and 2 blowing on top of the resistors.

Wire your fans (make sure they are 12v fans)