Portable fan with 4500 mAh backup battery, up to 37 hours of runtime, portable battery-powered pocket fan or foldable USB-powered personal fan - Black

Long battery life: The mini USB fan is equipped with a built-in 4500mAh battery that supports 20 to 37 hours of operation. A full charge provides 37 hours of operation at wind speed level 1, 33 hours at wind speed level 2, and 20 hours at wind speed level 3, allowing you to enjoy the fan all day long at outdoor or indoor events. Power bank function: The 5V/1A USB output makes the USB hand fan a power bank (4500mAh) for charging your mobile phone in emergencies. Flashlight function: The hand fan is bright enough to be useful in dark areas or during power outages. USB rechargeable hand fan with touch blades: This USB rechargeable hand fan can be charged via computer, laptop, or USB adapter. It only takes 2 to 3 hours to fully charge. Made with a special soft TPE material, the fan blades are very safe. If you accidentally touch the rotating blades, they will automatically stop, protecting you. Foldable and portable: This portable fan measures only 4.7 x 1.4 x 1.4 inches and weighs 4.4 ounces. It can easily slip into your pocket or purse when you go to Disney, camping, etc. The foldable design makes it easy to carry and store.