How To Power A PC Fan With Battery? [Make It Powerful]

How To Power A PC Fan With Battery

While working on the computer for a long time, it can heat up, and the machine can get damaged. In this case, the battery will provide power for your PC fan. Therefore, you must know how to power a PC fan with a battery and make it more powerful. 

When powering this particular fan, follow and remember some basic concepts. Wire a battery with a computer fan varies on its size and voltage. To hook the battery and fans, choose the same voltage battery as the PC fan.

This external power source is very effective for circulating air on fans that keep the computer cool. Also, it blows the dust from the fans. By powering up the fan, you will get a smooth experience using the computer.

Steps To Power A PC Fan With Battery: Easy Task

Powering a PC fan with a battery is quite tricky for a newbie. Some instructions should be followed strictly. Otherwise, the fan will damage, and the PC will shut down without any warning. Here is a step-by-step guide to setting up a battery with this particular fan.

Step 1: Collect The Necessary Instruments.

To wire the battery, collect the essential elements. Such as a computer fan, a switch, a drill, a battery, and an electrical wire. While wiring, take out the fan from the PC. After completing, put it back in its previous place.

When using the same voltage battery, make sure the fan is also the same voltage. Sometimes, a less-powered battery can perform the same. A 9V or 7V battery can operate a 12V fan. Take at least 12.7 cm of each wire. 

Step 2: Hook The Wire With Battery 

If you notice the fan, there are three wires out there —Red, black and blue. Work with the red and black wires. The other wire will remain the same. Most of the cases, the red one is positive and the black one is negative.

If there are no red or black wires, try to find out which one is positive and which is negative —strip 1.27 cm at the end of the wire to connect the battery. Connect the end of the red wire to the positive edge of the battery. And the black wire to the negative edge of the battery. 

Step 3: Connect The PC Fan

After wiring the battery, do the same for the fan. Connect the red (positive) wire to the positive terminal of the computer fan and the black (negative) wire to the negative terminal of the fan. Be sure to connect the fan with the wire correctly. A wrong connection may not damage the fan, but it won’t work. So, connect it correctly to run properly.

Step 4: Connect The Switch

If you don’t connect a switch between the battery and the fan, the fan will rotate continuously without stopping. A switch controls the flow of electricity from the battery to the fan. In this time, cut the red wire into half that you have used to connect the fan and battery. Strip both sides of that wire and connect the two shoulders of the switch.

Step 5: Put The Fan Back And Place the Switch

After wiring the fan with the battery and switch, it’s time to put back the fan on the CPU. Put the battery inside. To control the fan with the button, keep the switch outside.

While doing this, make a hole to place the switches’ heads outside the CPU. For this, use a driller to make a small hole in the shape of a button. There needs to be another hole to wire tie in.

These are the simplest way to connect the PC fan to the battery. Additionally, the switch will help you to control the power supply from the battery to the fan. After a few months, change the battery to keep the fan steady. Less power will provide less spinning and circulating less air. 

Things You Should Know When Powering PC Fan With Battery

Powering a PC fan with a battery may help the computer by cooling the CPU and making a stable condition for the PC. But, making any mistake while powering the PC fan may not work correctly or damage the instrument inside. So, below are some things that you should know when powering the PC fan.

  • Choose The Battery Properly 

This is the first and foremost thing to know while wiring the PC fan with a battery. The properties of the battery vary from fan size and voltage. The battery voltage should be the same as the fan or something less. For example, a 12V CPU fan can run on a 9V battery. Must try to use a minimum of 7V battery.

For the fan blades to start moving, the fan starts with a specific voltage. With the blades spinning at full speed, the fan can be run on much less current. Also, use a quality battery that lasts long. Because you probably don’t want to replace the battery every week.

  • Types Of Fans

It’s very important to identify the fan type of PC. Different types of fans need different types of batteries. The most popular fan types are a 2-wire fan, 3-wire fan, and 4–wire fan. The 2-wire fan has two terminals, power, and ground, the 3-wire fan has three terminals, power, ground, and signals and the 4-wire fan has four terminals, power, ground, signals, and PWM driver input.

The 2-wire fan and 3-wire fan have the same wiring system. Here the 3-wire fan with signals will show you how fast the fan’s blade is moving, whereas the 2-wire fan can’t detect how quickly the fan is running. In the case of a 4-wire fan, power and ground terminals are connected with the battery, signals show the rate of speed, and PWM input can control the fan speed.  

  • Wire The Battery And Fan Correctly

As I said before, the red wire indicates the positive one and the black wire shows the negative. But sometimes, the color may not be the same for each fan. For this, manually detect the positive and negative wires of a fan. 

The battery increases the speed of the fans and reaches top performance. Connect those wires with the battery, if the battery rotates reversely, you connect the wire in the wrong terminals. If it’s not spinning,  be sure that the fan is broken or the battery has not had enough power to speed up the fan. 

  • Connect The Fan With CPU Properly

Suppose the main desire is to cool the CPU and circulate more air to clean the fan’s blade from dust, and wire the PC fan with a battery to power up. Now, if the fan doesn’t hook with the CPU correctly, the process will not be fulfilled. The fan will not cool the CPU correctly.

For this, I must try to keep the fan in the right place where it was taken out. Keep a separate place for batteries that won’t touch other instruments inside the CPU. Make a hole for the switch and the residual wire that fits in.

3 Reasons Why You Need To Power A PC Fan With A Battery

A powerful fan is needed when the PC is being operated for a long time. These fans create a more cooling effect than regular fans. Also, powering it with a battery can save electricity at a significant level.  Some reasons why you need power are given below.

1. Optimize The Airflow

This is the most convenient thing to power a PC fan with a battery. An average PC fan absorbs the electricity through different resistance of the CPU. That’s why it usually rotates and circulates less airflow than the PC needs. 

The fan with the battery will power up the fan’s capacity and help flow more air. By optimizing the airflow, the dust on the PC will be removed automatically. Thus, this will prevent the instrument from being jammed. 

2. Improve The Temperature Of PC

Working with a typical PC fan causes less cooling than the PC needs. For this, when it’s time to work on your PC for a long time, the wire on it can get damaged, and sometimes the fan can be broken. 

By powering the PC fan with a battery, the fan doesn’t depend on the electricity provided by the CPU. Connecting the fan with the battery will give a large amount of electricity that helps to rotate more and circulate more air. This air makes a better cooling effect for the PC and improves its temperature. 

3. To Remove A Noisy Situation

If the fan rotates slowly, it may cause irritating noise. The noise can also come out if the base of the fans is jammed with dust or other things. In this case, using oil or lubricant can be a great solution. Except these, if there is any ambient sound coming from the PC, be sure that the fan is spinning slowly.  

Connecting the fan with the battery will significantly help to accelerate the fan. If the fan is not broken, increasing the power may overcome the noise.

Related Questions:

Can You Power A PC Fan With A Battery?

A PC fan can easily be powered up with a battery. With the help of a battery, you can generate more power for fans to circular more airflow and optimize the PC’s temperature. A battery provides more power than the PC itself. While powering, remember two main things–the fan capacity and the battery’s voltage.

At least a 7V battery is suitable for all kinds of PC fans. The more the battery voltage increases, the more output the PC fan will get. Also, while wiring, notice that the fan won’t spin reversely. Reverse spinning won’t circulate air properly. For this, identify the negative and positive wires of the fan. To wire the switch, use the positive wire on both shoulders of the button.

How Can You Power A PC Fan Without A Power Supply?

Select a DC power adapter that is compatible with the fans to power a PC fan without a power supply. If you use a fan with a 12V capacity, then buy a 12V DC power supply capable of handling x amount of fans.

With a 12-volt wall socket charger or supply fitted with 4-pin jack sockets, you could make it into a portable power source. It is possible to mount a connector on your case for the plug of a 12VDC wall outlet (consider not to short any wire case-related connections). Don’t need to think of wiring this time. The socket charger will do the same and the switch with the socket controls the fans. 

Can A 9V Battery Power A Computer Fan?

It’s possible to power a computer with a 9V battery. As I said before, at least a 7V battery is needed to run the fan. A 9V battery can run 4 computer fans at a time if the fans are connected in series and if the fans are consistent with it. 

But the fan will not work if you connect a 9V battery directly to the computer. Also, it may work a little slower. According to some experts, the 9V battery is a poor choice to connect a computer fan. It also provides less electricity than the fan needs. The fan spins slowly and circulates less air for a cooling effect.

How Do You Power A 12v PC Fan?

To power, a 12V PC fan, make sure to use the same voltage battery for better results. As I discussed before, at least a 7V battery needs to power a PC fan. But, because the battery’s capacity is lower than the fan, the fan may move slower. If you are using a 12V PC fan, wire it to a  12V battery for its top performance.

It’s the same process to wire the 12V PC fan with a battery. Use the red (positive) wire to join the positive terminal and the black (negative) wire to the negative terminal. If you don’t want to wire a battery, then connect it with a 12V dc adapter. Make sure that the socket provides 12V for the fan. 

Why Do PC Fans Have 3 Wires?

In most cases, there are three wires in a PC fan—Red, black and blue. The red one is called the positive or the power terminal, black is called the negative or ground terminal. The red and black wire is required when wiring with a battery. And the blue one is called signals which shows how fast the fan’s blade is moving. 

This third wire is beneficial for detecting the fan speed. You can optimize the fan’s speed whenever it’s showing that the fan is moving slower. Thus it helps to take a quick step. If no red, black, or blue wires are noticed, try manually detecting the negative, positive, and signal wires.

How Long Will A 9V Battery Power A PC Fan?

The time depends on the battery type. If the PC fan draws 50 mA (milliamp), a 9V alkaline battery can last up to 11 hours. A 9V battery may be disposable or rechargeable. A disposable 9V alkaline battery capacity is 550 mAh (milliamp-hours), whereas a rechargeable 9V lithium battery capacity is 1200 mAh.

If the fan’s capacity is 12V and draws 350 mA, a 9V battery will work for 3.5 hours. It’s easy to estimate the lasting time for a battery. The capacity of the battery is divided by the fans drawing power to calculate the lasting time. So, if you use a rechargeable 9V battery with 1200 mAh capacity and if the fan draws 100 mA, the endless time will be 12 hours.

Final verdict:

A powerful PC fan can keep the CPU temperature neutral. Powering a PC fan without a battery may damage it. You can’t easily determine the voltage while using a dc adapter.  So, firstly hook the PC fan with a battery and then learn how to power a PC fan with a battery. It’s handy to operate a PC for a long time. 

No matter what fan you use, every fan’s wiring system is the same. Remember, use the same voltage battery for the best performance. Because too or less powered batteries will damage or less perform the fans.

Read More:

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Md Saifur Ullah

This is Ahsan Ullah. I’m the main publisher of this blog. HomesValy is a blog where I share home related tips and tricks, reviews, and guides. Stay tuned to get more helpful articles!

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