We have two from Amazon that you can charge with a usb plug. I’m not sure which brands they are- purchased at two different times.
https://www.amazon.com/SkyGenius-Ba...roller+fan&dpPl=1&dpID=51CDh7pf5NL&ref=plSrch
They look just like this one. I just looked for the ones with the highest ratings at the best price. Have used them for 2 trips as well as other outings during the summer. I really like that I don’t have to replace batteries.