That's not what Maxon say the fact is if you run a 6 volt Swiss motor 12 volts you reduce the life of the motor by half. So if the motor is rated to last 3000 hours at 6 volts it will last 1500 hours at 12 volts this data can be confirm with Maxon themselves. Maxon them selves do thousands of hours of testing on all their motors and document it in their catalog and website.