how much power does the laptop fan use?

[CoBRaXT]

I have a Dell 700m that has a 40mm cooling fan at 5v. I not sure what its ratings for amps and watts are but I looked at some similar fans and .75W, .15A seems to be average.

How much battery time would I lose if I keep the fan on the low setting 24/7 compared to if I just let the compter decide when the fan needs to kick in? I currently get a bit under 4 hours with normal settings.

The reason I ask is because the fan doesn't turn on until the laptop gets extremely hot, and this gets very uncomfortable.

Thanks.

 

[imported_Kensai]

A few watts?
Maybe a few minutes of battery time?

 

[htmlmasterdave]

I'd say it probably uses between 0.5 and 1.5 W... more than that would be a lot for a fan of that small capacity.

 

[Tostada]

It's not going to make much difference. If you want a better answer ... well ... you're the one with the laptop. Test it.