The Vufine display has a battery of its own, but it lasts only 90 minutes, and while this may be enough for the Vufine's intended usage, it's insufficient for our purposes. That being said, we can charge the Vufine while it's being used, and thus extend its battery life. However, regular USB cables are rather large and since we want to minimize the weight, we will have to modify one (making it smaller and lighter in the process); we will strip a USB cable down to the very minimum.

Note: The rest of this step details how to get the connector from a USB wire. That being said, I was made aware of these cheap (in cost) USB connectors. Using them would allow you to skip the dangerous part of removing the connector from the wire. I have no experience with them, but I'll update this instructable on how to use them once I do.

Preparing the USB Cable

Note: This is, by far, the most dangerous part of the build. Extreme caution should be exercised around sharp knives

The first step in "minimizing" the USB cable is to cut it about 5 inches (I would say about 7 for a right eye configuration) up from the micro USB end. Continue by stripping the wire all the way down to the USB micro end.

Now, for the dangerous part, you'll have to cut the plastic encasing off using the X-Acto knife. I suggest using a set of pliers or a table vice to hold the plug while you cut it to minimize the risk of cutting yourself. The best way to cut it off is to cut along the seams on the side (they look like lines) as seen in the picture. You should be using a decent amount of force to dig the knife into the casing. After a while, one side may be able to "swivel" outward, and depending on how free it is, you may choose to use a pair of pliers to rip the rest off rather than cut it off.

Finalizing the USB Piece

Once you are left with just the metal piece, you should remove the two middle wires (the non red and black ones). You can do this by either cutting them off or using a soldering iron to desolder their connections and simply take them off (I suggest desoldering if you have enough experience). Next, put some hot glue on the base of the wires (where they meet the Micro USB plug) to provide an insulator and to keep it secure. When you're done, the image should look something like the USB in the picture (we haven't connected it to the Pi yet, though).

Connecting it to the Pi

This step is rather simple. All you have to do is solder the red wire to the 5v port and the black wire to the ground (GND) pin on the RPi. To see exactly what ports, see the image with the red rectangle on the Pi. To see a video on basic soldering, click here. I suggest you use some hot glue on both sides of the Pi (where you soldered) to secure the wires and to provide an insulator.