## Introduction: Power Bank

Hello! friends

Welcome to my another rechargeable power bank. In this project i'm gonna show you how to make your own power bank by using car charger.

So let's get started.

## Step 1: Circuit Diagram

With the help of this circuit diagram we can build our own power bank.

If you are using simple 9 volt battery you just follow the second picture of circuit diagram.

If you are using rechargeable battery then follow the first picture of circuit diagram.

## Step 2: Material

You'll need

A car charger

9 volt recharable battery (but i'm using simple to just show you)

9 volt battery jack

Switch spst

1n4007 diode

330 ohm resistor

Red led

Female pin connector

Data cable

Jumper wires

Hot glue

## Step 3: Disassemble

Open your car charger very carefully and take a circuit from it and remove the all other parts.

## Step 4: Soldering

Take a circuit board of car charger and soldering the +ve and -ve with piece of wires.

## Step 5: Making Holes

Make some holes according to your fitting.

## Step 6: Fitting

I'm just using simple 9 volt battery (don't plug the charger) but i replaced it with recharable 9 volt battery later. Fit the all components in a box make sure all connections are working properly according to the circuit diagram and put some hot glue on a components. Now your power bank is almost ready to use.

## Step 7: Finish

Now connect the data cable with your power bank and then connect the other side of the data cable with your smartphone push the button "ON" you can see charging is started of your phone.

Another benefit of this power bank is you can also connect your usb internet device (Wingle) with it.

I hope you guys like it.

I'm sorry about previous pictures its really dangerous. I never connect a li-ion battery in series again. If i need to connect a li-ion cells in series i definitely use a balancing circuit with it. I really thanks to my instructables friends they were help me alot show me a right path of using li-ion battery.

Again thanks you guys are awesome......;)