Review on 💨 O2COOL Treva 10-Inch Portable Desktop Battery Fan - Efficient Air Circulation, 2 Speeds - Compact & Folding Design with AC Adapter by Julie Bahr

This was our second O2 Cool fan. The first was a little smaller, probably 8 inches, and lasted for many years. Eventually the switch broke. So of course we opted for a different O2 Cool fan. We bought this 10 inch model because it was similar in design to our old one. something more that was good. Another difference we noticed was that the name was changed from O2 Cool to Treva. The fan was delivered on 06/07/2020 and died on 07/21/2020. Worked great initially, but within 5-6 weeks the fan speed dropped drastically (both on high and low settings). It runs so slowly that you hardly feel any air circulation. Always use the power adapter that came with the van as the power source. Thus, the fluctuations in fan speed were not related to battery drain. I actually tried the power supply from our old O2 Cool fan, thinking the supplied power supply might fail. No change, the fan still barely worked. So the fan died after six weeks of ownership (actually 5 weeks since we went on vacation for one of those weeks). I did not see any warranty on this fan and Revain's return policy has expired. So we go to the local store to buy a new fan. There are many positive reviews for this fan and we may have just received a bad one, but I will not buy O2 Cool Treva fans again.