Review by Chris B for Rating: I’m surprised to see negative reviews. We’ve been using these for 3+ years now and have no complaints at all.We use them on our boat in the caribbean. the temps are 80+ w/ humidity at 80+ also. it can get hot and stuffy in the cabin. but not with this fan. it puts out a lot of air for a little fan. and the heavy bottom keeps it from flying around the cabin in rough water or falling over when kicked at night.We run them every night, all night. batteries last about 2 weeks at that rate (about 125 hours.)but i always carry extras just in case.Plan on using one (1) per person.We finally replaced ours after the wiring became disconnected. I couldn’t find a way in to that compartment to fix it. but at $14 each, so what.