Battery question

madc0w · Post by **madc0w** » Thu Dec 29, 2005 9:15 pm

i have a question. Im making a laptop cooler so i can do marathon doom sessions, and i have a question. I'm using a 9.6volt battery with 1600mah and a 12 volt fan with 1500 mah. Will the fan run for about an hour, or will the Mah used by the fan change with voltage? Thanks!

superdeformed · Post by **superdeformed** » Thu Dec 29, 2005 9:41 pm

The fan will probably run for around 50 minutes or so on that battery. And mAh is a measurement of how much current a power source can support over a period of one hour; the fan's current draw would just be in milliamps, not milliamp hours

.

How big is the fan by the way? 1500 mA is a LOT of current for a fan to draw.

Post by **marshallh** » Fri Dec 30, 2005 8:45 am

I'm quite sure you mean the fan draws 150mA. Really, 1500mA is quite absurd.

madc0w · Post by **madc0w** » Fri Dec 30, 2005 11:12 am

oh, sry, thats what it was, it was .15 amps, i multiplied wrong. ive decided to do a wired one instead, so it really doesnt matter

timmeh87 · Post by **timmeh87** » Fri Dec 30, 2005 8:53 pm

in honor of madcows avatar, id like to tell everyone that i found some 7 volt 40mm fans at sayal (i think they were 40 mm. is that a standard size? maybe 30mm. they were real tiny though). i dont remember the current they were rated for.

anyhow, i got one, but when i got home i realized i had accidentally grabbed on of the 24v ones that were apparently right beside them.

oh well.

madc0w · Post by **madc0w** » Fri Dec 30, 2005 10:00 pm

timmeh87 wrote:in honor of madcows avatar, id like to tell everyone that i found some 7 volt 40mm fans at sayal (i think they were 40 mm. is that a standard size? maybe 30mm. they were real tiny though). i dont remember the current they were rated for.

were they animu fans???

Post by **gannon** » Fri Dec 30, 2005 10:30 pm

of your last avitar

madc0w · Post by **madc0w** » Sat Dec 31, 2005 1:22 pm

hence the wink