i have the Ridgid fan and absolutley enjoy the heck out of it. I tried the 1.5 hour battery just for giggles and on full go it lasted just shy under 4 hours. i do enjoy that the fan is a hybrid version meaning it can be plugged into an extension cord. I use the fan in a machine shop for 12 hours during my shift on full go. This fan moves air and from such a little fan is a surprise but it does a great job from about 4 feet away. any questions please ask