UniFire&reg; 4-inch Vanes 3 Speeds Super Power Electric Portable Mini Rechargeable Battery Fan & USB Laptop PC Mute Cooler Cooling Operated Desk Cool Cooler Fan with Rechargeable 18650 2200mah Battery and USB Charge Cable Quiet Cooling for Indoor & Outdoor Work Activities Laptop PC Computer (Blue) 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 Using the brushless motor industrial grade fans, high winds and long life have adequate safeguards. High winds and long life have adequate safeguards. Battery type: Li-ion 18650 (INCLUDED)