Electric radio-controlled cars are quick when built with the stock engines and receivers but go even faster with upgraded parts. With an upgraded engine and electronic receiver, the driver has a better chance of winning a race. It is important to look at the type of battery being used to power the electric radio controlled car. A new, freshly charged pack sends the car off the starting line much faster.
Unplug the two differently coloured wires that connect the electric motor to the car's receiver by pulling the wires gently apart.
Unscrew the electric motor from the chassis of the car. There will be normally two to four Phillips-head screws that must be removed in order to take out the stock motor, depending on the make and model of the car.
Pull the stock motor out of the car and replace it with the upgraded motor. Upgraded brushless motors turn at a quicker rate, allowing the wheels to spin faster. Screw the upgraded motor in place with the same two to four screws.
Unplug all of the wires attached to the car's receiver, which is the part that receives the commands from the transmitter via a frequency crystal. Remove the two to four screws holding the receiver in place with the screwdriver.
Place an upgraded electronic receiver in the same place and fasten it down by screwing in the two to four screws. Plug the wires from the receiver back into the servos, which control the steering and speed control.Plug the two wires from the motor into the receiver using the matching colour combinations. An upgraded receiver will catch the transmitter commands quicker, thus allowing the car to accelerate more quickly.
Charge the new 7.2 volt battery using the battery charger before using the radio-controlled car. A fresh battery will give the car the more power and last longer.
Plug the battery charger into an electrical wall outlet. Plug the 7.2 volt battery pack into the battery charger. Set the battery charger controls by turning the dial to maximum amperage.
Start the battery charge by either turning the timer dial or by hitting the start button, depending on the type of battery charger. Manually set chargers will need the timer dial to be turned in order to start. Electronic battery chargers start charging the battery once the start button is pressed in.
Remove the battery from the charger once the charging process has stopped. Let the battery cool down for ten minutes before placing the battery in the radio-controlled car.
Let the car and used battery cool down for ten minutes before using them again. This will help the longevity of the electric motor and battery.
Do not overcharge a battery. This may cause the battery to explode, causing an injury.