Greatshop&reg;portable Mini Fan Rechargeable Desktop Outdoor Fan with LED Light 4-inch Vanes 3 Speeds Battery/ USB Powered Household Summer Cooler Cooling Operated Cool Cooler Personal Fans with 18650 Rechargeable Battery and USB Charge Cord (Black) Strong winds and long life have adequate safeguards. Using the brushless motor industrial grade fans. International standard 18650 capacity lithium battery provides exceptionally long using time and strong power output. The integration design, simple appearance, solid structure, it is realize the huge wind capacity fan portable, more confidence in the transport and using. Battery type: Rechargeable Lithium-ion battery 18650 3.7V (INCLUDED)