if you follow the links in this post and go towards the bottom of each page you will find the following information for the victors, and not just the fans.
IFI Robotics V883
IFI FIRST V884
IFI Robotics V885
IFI Robotics Victor High Voltage
Operating Voltages:
V883: "Operating Voltage 6V to 30V (does not include the fan)"
V884: "Operating Voltage 6V to 15V"
V885: "Victor Operating Voltage 6V to 30V (does not include the fan)"
V-HV: "Victor Operating Voltage 12V to 42V (36HV) / 12 to 60V(48HV) (does not include the fan)"
As i said before and i will say again, check before you do anything as you dont want to ruin a victor because you didnt spend the few minuets to check with IFI to see if what you want to do will damage the product.