Step 1: Materials/Tools
Solar Cell (I used a 6v 50mA one)
Project Box (I used a 5x2.5x2 and it fits perfectly but any small enclosed box that you can cut holes into will do fine)
12VDC Car Power Outlet Socket
Vecro (or your adhesive of choice)
You will also need a soldering iron (15 watt. SKU: 64-2051B), solder (62/36/2. SKU: 64-013), and something to cut 2 holes in the project box (I didn't have anything available designed specifically to cut holes, but I just used my CRKT knife and it worked fine)
Step 2: Cutting Holes
The next hole will be cut in the bottom part of the project box. Standing the project box up vertically, the hole will be cut in the small square side that is facing up in the air. The hole needs to be big enough to have the 12VDC socket fit in, but small enough to keep it snug. Basically start small and keep testing to see if the socket fits. You can always make the hole bigger, but can't make it smaller...as easy.
Step 3: Assembly Before Soldering
Step 4: Time to Solder
I had to wait 2 days before the sun came out, but it was worth the wait. It charged my phone right up!