Battery Crew

Car Battery

Top 6 Functions Of A Car Battery

The car battery is a crucial component that has a wide range of functions beyond just starting the car. It is a vital part of a complex and integrated system that supports various processes in the vehicle. The electronic systems in the car rely on the battery to ensure they are running properly, while the battery also helps improve fuel efficiency. The internal chemical solution, along with the lead layers and lead dioxide plates, creates energy through a chemical reaction with acid. This highlights the importance of the battery’s functions, which should not be taken for granted

Essential Functions Of A Car Battery

1. Starting the Engine

The car battery contains the power needed for the engine to start. Its components generate electricity through a chemical reaction with acid. It’s important to note that higher temperatures result in more power due to chemical reactions.

2. Powering Electrical Systems

The car battery is the main power source for a vehicle’s electrical system, powering various car functions such as headlights, turn signals, window defoggers, and more. It is crucial to ensure the car battery is in good condition to avoid the inconvenience of a dead battery and the need for a recharge.

3. Conducting Routine Leak Checks

A battery leak test should be performed when frequent discharge is noticed during unloading. Moisture, dirt, and grease stuck on the battery case can cause the car battery to leak, draining the battery over time. By conducting regular leak checks, you can maintain your battery and extend its lifespan.

4. Stabilizing the Electrical System

The functions of the car battery ensure that the car’s energy system is sustained. Upon starting the vehicle, the battery is recharged by an alternator, ensuring everything works while driving. Newer battery types have built-in systems that prevent them from getting dried out of energy, protecting them from corrosive damage for a longer time.

5. Providing Backup Power

The alternator works in conjunction with the battery to provide electricity for various car accessories. However, in moments of high energy usage, such as on hot days with the air conditioning on max, the battery provides extra power to ensure everything runs properly.

6. Supporting Fuel Efficiency

A properly charged car battery is crucial for the fuel injectors to add fuel to the cylinders. This helps improve fuel efficiency and prevent the loss of fuel mileage. If you notice the engine lurching or the car running a little rough, it could be an indication that a check of the car battery is in order.


Knowing how your car and battery work is always beneficial. In certain situations, your knowledge might be exactly what you need to reach your destination. However, if this is not your profession, it will be hard to know everything about car batteries. If you live or are traveling around Gauteng and have car battery issues, Battery Crew is one of the best battery retailers and distributors in South Africa. With great pride, superb customer service, and skilled professionals, they are always ready to be of assistance.