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How To Power a Computer Fan Without a Computer PSU

If you wanting to connect your computer cooling fan without using a computer power supply, you can power your computer fan with the following power sources below:

1)You can power you computer fan using small powered batteries, that make a total of 12 volts.

2)You can use a car battery charger to power your fan.

3)You can power your computer fan using a 12 volt dc adapter, that you can plug directly into your external electrical wall outlet.

4)You can use a CB radio power supply because they are rated at 12 volts, which is a ideal power source because it can provided a constant 12 volts, which means you fan rpm will not slow down after a long period of time.
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