It all begins with me buying the wrong plastic box....
i wanted to do a "solar something" like that for a long time and this was the trigger.

Step 1: Stuff You Need:

*plastic box
*Solar panel (in my case 12v 5W ≈ ±$10) - some good advice - buy a bigger one!
*Battery (in my case 12v 7ah ≈ ±$25)
*Solar charger (cmp 12 12/24v ≈±$8)
*Load sockets (i bought a set on eBay with two USB sockets and a car lighter socket ≈ don't remember price)
*Wires (i used a power cable and took out the wires
*fuzes (one 10A fuse is enough but used five just because they come in a pack. ( on eBay ≈ don't remember price)

*Most important - one sleeping baby!

Step 2: Tools You Need:

*Wire cutter
*Soldering tools
*Screw driver
*Hot glue gun
*Voltmeter

Step 3: Connect the Diode

With the soldering kit connect the diode to the Positive terminal (grey line to flow direction)
finish with the hot glue gun and make sure everything is covered.

Step 4: Assembling the Load Sockets

This is a good time to think where you want to place each component in the box.
I made the mistake of connecting the battery last. i placed it in the far end of the box and now its not balanced when i carry it around.

To place the sockets i used a soldering pen to cut holes through the box and fitted the sockets.