A conventional 12-volt battery in electric cars that powers systems like the alarm, lights, and central locking.
An auxiliary battery, also known as a secondary battery, is an additional battery that is installed in a vehicle to provide power to various electrical components. In the UK, this term is commonly used in relation to electric and hybrid vehicles.
In electric vehicles, the auxiliary battery serves as a backup power source for essential systems such as the lights, radio, and climate control when the main battery is being used to power the electric motor. It ensures that these auxiliary systems continue to function even when the main battery is depleted or disconnected.
In hybrid vehicles, the auxiliary battery plays a similar role but with some additional functions. It helps power the vehicle's electronics and accessories when the engine is turned off, such as during stop-start traffic or when parked. It also assists in starting the engine by providing an initial power boost.
The auxiliary battery in a car is typically smaller and has a lower capacity compared to the main battery. It is often located in a different part of the vehicle, such as the trunk or under the hood. It is important to maintain and periodically check the auxiliary battery's charge level to ensure its proper functioning and to avoid any unexpected power failures.
Overall, the auxiliary battery in a car is an essential component that helps provide uninterrupted power to various electrical systems, ensuring a smooth and comfortable driving experience for UK drivers.