Molex to battery?

Single AA cell = 1.5v (1.2v if rechargeable).

PC Fan voltage = 12v (can be 7v too for quietness).

Therefore you would need at least 5 AAs (7.5v) or 8 AAs (12v) to power the fan. As for connecting it, just get the appropriate number of battery boxes in series. Then chop off the male molex connecter from the rest of the loop in the picture and solder the black and red wires to the battery box(es). Job done.

Might I ask why you need to power it by a battery? Also if you don't care for trashing the parts you have in the picture you could solder the fan wires directly to the battery but it's no extra effort to do what I described so may aswell do that.

Hope this helps, null :)
 
Ok cheers will try that.

Just wanted to run a spare one of a batteru to see if it could be done cause i got some spares ones lighing about.

Was gona see if they were good enough to actually cool me.
 
I did something similar a few weeks back. I had a pair of 80mm fans spare and due to the increasing temperatures decided to tape them to the top of my desklamp (thus allowing me to position them at the perfect height and angle). However instead of powering them off batteries, I used the external molex that my psu has (Antec Trueblue). I made up my own cable using a spare female molex I had and a metre or two of figure of eight wire terminating on a piece of veroboard. I had some of the 2.5mm spaced header pins used on motherboards etc. lieing around so soldered those on, giving an external motherboard fan header extender in effect.

Back those few weeks ago the airflow was pretty low but enough to keep me cool. However with the recent heat I couldn't bare it anymore so gave in and bought a nice 12" desk fan for myself (got it on Wednesday morning just in time for the hottest day I can remember). :D

Hope this helps, null :)
 
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