About this item 6000mAh Battery Capacity Compared with other portable fans on the market, this model is equipped with a larger battery capacity of 6000mAh (twice as large as others), which supports 5-20 hours of working time on a full charge. The battery life depends on different speeds: Speed 1 (20 hours); Speed 2 (15 hours); Speed 3 (5 hours). Portable/Desktop Fan This mini portable fan can be used as a handheld fan outdoors and used as a mini desk fan on a flat table in the office. There is a non-slip mat at the bottom of the base to keep it stable when placed on the table. USB Rechargeable The mini handheld fan is USB rechargeable with only 3 hours to fully charge it. It supports USB charging by USB charger, car charger or computer. Easy Cleaning & Mini Size Featuring a removable cover, this mini portable fan is easy to clean by simply rotating the cover and fan counterclockwise to separate the cover and fan. Besides, it is small in size for convenient carrying in your bag.