This has made camping so much more enjoyable. I was able to get through three nights on lower settings without draining my battery, and the wind was much stronger than I expected from these small fans. They were fantastic for keeping us cool on an 85 degree weekend in the tent. After camping I left one on my desk when it got a bit stuffy in the office and I had a strong feeling that from now on they would take us to the beach so we wouldn't be exhausted when we left the office water would come out. .