2 to 5 business days
These are emergency rechargeable Lamps.They are charged via usb cable provided or just any usb cable like that of smartphone and you can charge it with any USB outlet.No need to worry when power is out. Just have them charged in time and they will really help when power is gone.They take between 6 to 8 hours to charge and also they last from 6 to 8 hours depending on brightness mode set