Don’t buy this. Piece of junk. Lasted 2 days–won’t charge and won’t run on house current.
I have had precisely the opposite experience. I’ve been sticking to this particular fan model for quite a long time - as in I literally have them running all day or all night (depending on whether or not I’m at work or at home) and with that workload (and almost no dusting, because I’m lazy) they generally last me about two years or so. As I need airflow to be able to get any sleep at all, they’re lifesavers.