2000mAh Built-in provides 14-21 working hours. 21 Working hours under wind speed gear 1, and 14 working hours under wind speed gear 2 with one full charge, so you can enjoy the fan whole day during outdoor or inside events. Bank Function5V/1A USB output port makes the mini fan as a power bank (2000mAh) in emergency to charge your mobile phone.Flashlight FunctionThe flashlight is quite bright and can be useful in dark areas or if electricity is out.USB Rechargeable and Touchable Blades mini pocket fan can be charged by computer, laptop or USB power adapter. It only takes 2-3 hours to get full charged. With special soft TPE material, the fan blades are very safe. If you accidentally touch the rotating blades, the soft blades will automatically stop and keep you safe.Foldable and PortableThe size of this pocket fan is only 12*3.2*3.2 cm, weight:129g. It can be easily put it in your pocket or purse when you are out to , camping and so on. The foldable design makes it easy to carry and store.