if you want to just connect it directly, you can purchase a connector that fits your battery (the RC store where I bought the battery sold me the male connector). Wire that to your fan and it is instant on when you connect the two. OR you can wire in a switch, again pretty straight forward. The complicate step is adding in the three way switch that allows full power or 5V step-down, that took a little finessing and help from a friend with more skill than I have. He gutted a car USB charger for the circuitry and voila 5V option. This way it is not over draining the battery using resistors.