9 Volt USB Charger
This is a portable usb charger made for a car charger and an Altoids tin .
Parts
You will need an Altoids tin, USB car charger, 9 volt battery and clip ,and a small toggle switch
Soldering
Solder the negative wire of the battery clip to the negative terminal of the car charger. Solder the positive wire to one side of the toggle switch then solder a wire to the other switch terminal and the other end of the wire to the positive terminal of the car charger
Drilling
Drill a hole for the switch and the usb
Assembling
Put the parts in the Altoids tin