If motors are like the engine of a car, then The ESC is the timing system. It takes input from the flight controller about what it needs to do and translates it so that the motor can do it accurately without a hiccup. These are a limiting point to how big a battery you can put on your drone, as they are only rated to certain voltage inputs. The amperage will help against issues in the system so long as it's rated to handle more than is being asked of it. Find the perfect ESC for your next build right here at RaceDayQuads.