9 Volt mini muffin fans

I was scrapping out a projector and salvaged two 12v fans. They run just fine on a 9volt battery. I use one at the soldering station to pull the fumes away from me, and the other on the paint bench. My weathering is all done with washes of acrylic paint thinned with isopropyl alcohol, and the washes dry almost instantly with the little fan blowing across. I can apply the next layer of wash right away. Sure speeds up weathering.