Super Juice Pack

Have you ever wanted the ability to recharge your electronics whilst camping, or on the job site.

Step 1: Acquire an Old Cigarette Adapter From Disposed Car

I ripped this out of an old Hyundai Elantra

Step 2: Identify the Positive or Hot Lead.

While working with DC you want to make sure you have your polarity set correctly. in this case the hot or positively went to the center of the DC adapter

Step 3: Attach the Ground or Negative Lead

All you really need to do is make sure to connect the negative lead 2 the outside chassis of this cigarette adaptor. In this case I used some blue painters tape to adhere the exposed ground lead to the chassis. This also helps in the final product. As you see you in a moment

Step 4: You Are Finished..... Continue

This is all you really need to do to finish this instructable but I decided to finish mine out with an old flashlight

Step 5: Remove the Inside of One of Those Old LED Flashlights

You can do whatever you want here I'm just showing you the outside of an old flashlight

Step 6: Pay Attention

So earlier when I said be sure to make sure you have your polarity correct this is what happens when you don't pay attention. You explode your very nice USB car charger.

Step 7: Connect to Your Power Supply

Here I'm using an 18 volt 4 amp hour lithium ion battery. Make sure your negative or ground lead is hooked up to your negative or ground side of your power supply. Then make sure your positive line is hooked up to the positive side of your power supply. Welcome to direct current. The power adapter should condition from 12 to 24 volts DC input to 5 volts DC output.

Step 8: Attach Your USB Charger Device

So I usually use this to charge my phone, Not my Xbox controller.

It was hard to show me charge my phone with my phone. I really hope this helps somebody.

It's just a common sense approach to a problem we all have. I have used this to help charge several smartphones and other devices over a three day weekend. This setup should/could/will charge several devices several times. It lasted my friends and I 3 days using iPhones and androids.



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    8 Discussions


    4 years ago

    Instructable number two. I really do enjoy this platform.

    1 reply

    4 years ago

    You can use a diode for protection against wrong polarity. Or a bridge rectifier would allow it to work no matter which way the battery is connected.

    3 replies

    Reply 4 years ago on Introduction

    Good to know.

    I knew that leds were directional. I just don't have an led that can hold 18volts without popping. So just hooking it up right is my best advice so far. I guess i should go figure out a bridge rectifier.

    Would you know how to figure out how long or how many cell charges you could expect? Here is the thing. I bought a key chain battery booster that has/had 4 amp hours. It lasted like 10 minutes in airplane mode. This battery is also 4 amp hours. It is like a Tootsie roll pop, as in i have never made it to the tootsie roll center (a dead battery) with out getting bored and recharging.

    I am sure there is a formula for this....

    Cheers and now I'm off to Google. Woosh


    Reply 4 years ago

    He's not talking about a LED but a diode, it works the same way but with higher voltage and no light.


    Reply 4 years ago

    Oh, and an LED just needs an appropriate resistor to work with 12v.


    4 years ago

    Great job. Do you have the leads taped to the Ryobi battery? I wonder if Velcro would hold it tight enough.

    1 reply

    Yeah But be sure and match the polarity correctly. I just wrapped some Electrical tape to hold this in place. It works well enough if you leave the unit in one place. I don't want to modify the battery as I still use them with my tools. I like these Batteries as they are powerful and lightweight