Bests & Worsts Reviews from Amazon

I work in a very hot warehouse, with a mask in Las Vegas with minimal ventilation at my work station... I bought this unit and I really do like the cool air it provides, I just wish the charge lasted longer when used on the highest setting. Fully charged I got one hour of use.... using on the middle setting it can last about 3 hours.. the lowest setting is pretty useless.. if only there was separate battery units that could be charged ahead of time and could change them out as needed, I think it would be perfect then, since it takes time to recharge and I can't always do that at my job.