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Make You Car Charger for your cell into a USB Charger

Updated on June 15, 2009

Here is a really easy hack you can do to your car charger for your cell phone. I don't really know if anyone wants to do this, but I did and so I thought maybe someone else does. The reason i did it was..

I only had 1 charger for my phone and it was a car charger. I live on the 2nd floor of an apartment. I didn't want to have to run down stairs and plug my phone in my car. Also theres the risk of theft or missing a important call.

So here's how it's done:

1. Cut your Car Charger cord, Closest to the part that plugs into your cigarette lighter so you have lots of cord to work with. You really wont need much though.

2. If you have an old USB cord sitting around in your house cut that furthest away from the USB plug again for more work room.

3. You going to strip the ends of each cord, and get the Red and black wires out. Cut off the rest of the wires.





4. Strip the red and black wires from both cords and connect the black wire from the car charger to the black wire on the USB by twisting them together. Do the same for the red wires.




5. Now with some electrical Tape, tape the 2 wires separately so the wires don't cross. after that you can tape all together to make it look nice.

 Your done! Now just plug this into the usb on you computer or even your xbox 360 and the other end to you phone and it will charge it!. Thanks for reading hope someone can use this.


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      Chris L. 3 years ago

      Thanks a bunch for this! It saved me a little money.

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      stacey 4 years ago

      i have been looking for a car charger for my phone witch no one seems to have so i did kinda what you did but i took a wall charger and a car charger cut the wires connected them together plugged it in my car and it worked thank you so much now i have a car charger.

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      Steve 4 years ago

      Well awesome now i have 2 broken chargers..

    • profile image

      Jerry 4 years ago

      my car charger does not have a black wire just a red and a clear one...

      What do i do?

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      Jonathan 4 years ago

      I like what you did but I have one suggestion. There's nothing from stopping you from also connecting the car adapter as well so it could have dual use.

      Many devices now come with A/C charges that have a USB output port so you could use this with that of course as well. The PC outputs 500 mA but a lot of charges often put out from 750 amps up to 2 amps for ipads, etc.

      You might have to incorporate some diode or resistor into the lines from the car adapter to prevent reverse current but I doubt that would be an issue.

      TO Ramans / Johnson, You can get a micro USB board that has simple battery +/- inputs (solder) and a USB output. Simply put this with a 14500 or 18650 battery (or two in parallel, 3.7 v each, 14500 is same size of AA and learn about them on which will give you great portable charging power.

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      Liz 5 years ago

      I had the same issue as "Balls deep" i needed to fix my existing usb charger.

      Great tutorial!

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      thusnewmexico 5 years ago

      Thanks--great instructions, only we didn't have a black wire on the usb, so we attached black to white and it worked perfectly.

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      Jack 5 years ago

      Thanks a million, worked like a charm!

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      Rich 6 years ago

      Lol. I was looking at the tangled heap of cables and wondering if this was possible. Took me 2 days of deliberating before I bothered to google it, hit this page and YES! You gave me the confidence to try it.. and my phone is charging.


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      Erik 6 years ago

      Used this to charge my old ds. Thanks a million

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      Luis 6 years ago

      Life Saver

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      nicole 6 years ago

      TY!! That was awesome advice....worked like a charm!!!!

    • profile image

      sweden 6 years ago

      Thanks I made same thing but connected direct to the car red and black. Clean;)

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      Johnson 6 years ago

      Hey dude. Good work there. But it would have been more good if u taught how to make a usb charger. Not a usb cord. Cause we get a usb cord with each phone. Can u tell me how to make a usb charger.pls if u know how to the mail me.

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      Balls deep 7 years ago

      Thanks bro...I acutally used this concept to rewire a usb to my car charger for my blue tooth. So I can charge both my phone and blue tooth at the same time.

      Huge help. Gracias.

      Mike in NY

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      jared smith 7 years ago

      you are pro thanks soooo much

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      JMFG 7 years ago

      Thanks bud appreciate the info!

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      Thinking the same thing 7 years ago

      Good Stuff

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      Damian 7 years ago

      I've been wandering about this for about a year now thanks bunches!!!!

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      MISERY MANSLAUGHTER 8 years ago