4-inch 3 Speeds Electric Portable Mini fan Rechargeable Desktop Fan Battery/ USB Powered Laptop PC Cooling Operated Cool Cooler Fan with Rechargeable Battery and USB Charge Cable (Blue) Different ways to charge fan with lithium battery in: connect micro USB charging cable via computer/notebook, car charger, power bank, 5V wall USB charger, 5v solar charger etc. International standard 18650 capacity lithium battery provides exceptionally long using time and strong power output. High winds and long life have adequate safeguards. Come with a bright white LED light on one side for illumination use.