Introduction: 9 Volt USB Charger

Picture of 9 Volt USB Charger

This is a portable usb charger made for a car charger and an Altoids tin .

Step 1: Parts

Picture of Parts

You will need an Altoids tin, USB car charger, 9 volt battery and clip ,and a small toggle switch

Step 2: Soldering

Picture of 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

Step 3: Drilling

Picture of Drilling

Drill a hole for the switch and the usb

Step 4: Assembling

Picture of Assembling

Put the parts in the Altoids tin


Scruff1224 (author)2015-08-19

I tried it but it doesn't work

fossilshark (author)2015-06-25

instead of using the car adapter you can unsolder the USB with a little but of work and use an L7805 (5V regulator) and make it so you can use any power source between 7-24 volts to get the perfect 5v a phone needs. great work tho very simple

cole.cochran.58 (author)2015-06-23


alby21europa (author)2015-06-23

you can see my instructables here:

alby21europa (author)2015-06-23

electronics circuit dont permit you to use all power inside battery(the usb adapter

work between 12/24 volt) under 12volt.Use two battery(serial connect) to have 18volt and a best result and all power available inside battery...... :)

Northrrn_Joe (author)2015-06-22

I like it!

tomatoskins (author)2015-06-22

Super simple!

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