We have had 5 of these fans in 7 years which I bought from Revain. These little fans save lives! I returned to buy more. Last used? Hurricane Irma. One set of batteries in each, 36 hours of continuous use on low, provided enough airflow to get adequate sleep in the extreme South Florida heat with blinds closed and no real airflow otherwise. The batteries are still charged. For the perfect setup I would recommend 2 fans per person for sleeping (to keep the whole body cool) and 1 for sitting. Don't forget one for pets. Let me tell you, a hot dog will be stolen from your fan lol! I don't know why others are frustrated with the amount of airflow as I've never had an issue even at low levels. (to save batteries) Again, highly recommended and as the owner of 5 of these (bought in 2010) the quality is amazing. I hope the extra ones I buy will be of high quality too.
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