1.The wind will be weak when it is low battery. If continue use, the fan will turn off automatically when the battery runs out. 2.Lithium battery has no memory effect, you can charge it anytime to preserve battery power, so as to prolong the service life of battery. 3.Do not contact with hair, fingers and face when the fan is working. 4.Children under 10 years old should use it under the instruction of adult. Do not touch the fan blades when it is working to avoid scratch.5.Please fully charge the battery and keep it in a dry and cool place after sealing it in a plastic bag when not in use for a long time.6.The battery can't work in an environment above 60℃ and it can't be extruded or disassembled, which might shorten the battery's service life or cause leakage or explosion.7.To keep using effect and service life, please only use accessories offered by our company.