How do I power a CPU fan with AA batteries?

Reloadron

Joined Jan 15, 2015
6,066
What voltage are your batteries? Typical CPU fan draws 12 Volts at about 100 mA. So to run the fan at full speed you need about 12 volts. Also, is how many wire fan? You need to provide more information for good answers.

Ron

Ron
 

crutschow

Joined Mar 14, 2008
27,761
Measure the current draw from the fan with a multimeter (connect the multimeter, set to amps, in series with the fan).
The AA's likely have about a 2Ah capacity so, divide 2Ah by the fan current in amps to see the maximum hours the fan will run before you need to recharge.
 
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