Voltage, measured in volts (V), is the electrical pressure that pushes the electrical current through a circuit. In the context of RC cars, the voltage of a battery is an important factor to consider when choosing the right battery for your car.

The voltage of a battery determines the power that can be supplied to the motor, and thus the speed and acceleration of your RC car. A higher voltage battery can supply more power to the motor, resulting in a faster and more powerful car. However, it's important to note that a higher voltage battery also means that the battery will be drained faster and therefore need to be recharged more frequently.

Different types of RC cars require different voltages, for example, a 1/10th scale car may require a 7.2V or 7.4V battery, while a 1/8th scale car may require an 11.1V or 14.8V battery. It's important to check the manufacturer's recommendations for the appropriate voltage for your specific RC car model and usage.

It's also important to note that using a battery with a voltage that is too high for your RC car can cause damage to the motor and electronic speed controller, leading to a loss of performance and even causing a fire hazard. Therefore, it's important to choose a voltage that is appropriate for your specific RC car and usage.

In addition to the voltage, other factors such as the capacity, discharge rate, and C rating of the battery are also important to consider when choosing the right battery for your RC car. It is always recommended to check the manufacturer's recommendations for the appropriate battery for your specific RC car model.

It's important to always use the right type and voltage of battery for your RC car, and never to mix different types of batteries. It's also important to never overcharge, over-discharge or overheat the battery, as this can cause damage and even fire hazard.