Velociraptor Motors & Set-ups should only be run on a power supply at 2 to 3 volts MAX for no more than 30 seconds. They will overheat causing damage to the motors. This is due the extreme strength of the magnets. They are equal to or more powerful than most of the GP-7 cobalt magnets on the market at this time. This extreme strength (1800 – 2000 gauss) means these motors deliver GP-7 performance in an affordable package. Because of this these motors require a lot of current, it is this high current draw that gives them such a high amount of torque (POWER) but it is also what generates the high heat. Please exercise caution when breaking these motors in to avoid heat damage.