Mini Fans
Battery capacity: 6000mAh
Working hours: 8-20H
Model: N20
Battery capacity: 5000mAh
Working hours: 4-13H
Model: YJ-541A
Battery capacity: 4000mAh
Working hours: 3-7H
Model: MD-F856
Battery capacity: 2000mAh
Working hours: 2-7.5H
Little tips: please kindly check spec of each models.(Different models of battery mAh are different)