I have not use the batteries.
This item works wonderfully and is a delight to have, It is great for staying cool during power outages, storms or for camping.
This is great.
I like that it also has an AC adapter so can be plugged in as well and that it folds to a nice compact size for travel.
Bring these camping or use them outside in the summer, they seem to last all season for me on one set of batteries and definitely cool you down when its hot.
This would only be useful if it was sitting on a desk right in front of you but it's too large for that purpose.
Now long after I received the two they also took a dump I only used the fans plugged in and ran them for maybe 3 hours a day and not one lasted longer than a month.
It pushes air about one to to feet and after that it's no good.
Do more research and don't buy a fan even if it has a lot of good reviews.
I don't see the fan we have remaining lasting very long.