HELPFUL HINTS AND C : » When the transmitter’s range decreases, replace the 9v battery, + When the car moves slowly, or does not move at all, replace the 9.6v battery pack. » Running the car for long periods generate high heat levels. Heat causes wear and tear on motors, Let it cool at least 10 minutes before installing a newly charged battery pack. * If you do not plan to use the toy for a Jon tire, veniremen the batteries from the transmitter and car.