Review on DYSERLAO Handheld Fan - 3000mAh Rechargeable Battery, Portable Mini Fan with Foldable Design, Adjustable 3 Speeds & 4-10 Hours Operation, Low Noise, Lanyard - Ideal for Girls, Kids, Women, Men, Home, Office, Travel, Outdoor (Black) by Cristina Wicomb

This fan is 100% amazing. I'm a very, very hot person. I sweat even in winter, especially when I go shopping. I have it in my car now, plugged into a USB charger so it's always ready. Even at the minimum, it ejects a lot of air. When fully charged, it works about 4 hours. So my trick is that I now carry a USB rechargeable battery with me so if my fan dies I can just plug in my backup power and work for a few more hours. I also take it to company parties as many conference rooms are too hot. I can fold the pen and put it next to my laptop.