Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cool Fan

Needed a battery operated fan to use at outdoor craft shows in hot summer weather. Much to my delight, I was able to connect this fan to my Black & Decker portable battery charger using a car charger adapter in the port on the battery charger and it ran for two 8 hour days without draining the charger. Moved a nice lot of air & helped keep us cool all day. For it's size, this worked well.