Portable Usb Cellphone Charger V2

Hi instructable viewers!
In this tutorial i am going to show you how to make portable usb cellphone charger V2
Its very simple and it will cost you only 2$

So parts list
12v car usb charger (smaller the better)
9v battery connector
slide switch
9v battery

Tools you will need.

Soldering gun 
Hot glue gun
solder 
screwdriver

If you have any question be sure to ask them in comments ;)

You can make this even more cheap if you use rechargable 9v battery.

Hope you enjoy!