What is a car battery?

Don’t let your battery inconvenience your holiday plans

One of the most important components of any vehicle, your car battery’s main role is to provide starting power for the engine. It also supplies power to accessories such as lights, fans, radio and electronic components when the engine is not running.

Our team at mycar are experts when it comes to car batteries. With industry-leading guarantees and an extensive range of car batteries on offer, you really can’t go wrong!

How does a car battery work?


When you turn the key to start the vehicle a lot of things happen, the first thing that will happen is that the battery in your car will start to lose voltage.

The reason for this is that the battery is concentrating on turning the starter motor to make the vehicle start. Once the vehicle starts then the alternator charges the battery back-up. So, the battery will constantly drain and recharge every single time you start and drive your vehicle.

The next thing that will happen is that the starter motor’s gears will try and engage with the flywheel or ring gear of the engine. To make an engine start it must be turned at speed; this will allow fuel and air to be drawn into the cylinders, compress it and make the vehicle start.

In simple terms, the battery provides the power, the starter motor turns the ring gear on the flywheel which turns the engine, add a bit of fuel, air and spark, and the engine should start. So think about how many times you start your car every week, the above is happening on a regular basis.

Car batteries can fail at the most inconvenient of times

Battery failure is one of the leading causes of starting trouble, whether because of lights being left on, a charging system problem, or the battery has met its life expectancy.

Over time these components will eventually wear out. Things that can speed up your battery wearing out are:

  • Charge rates
  • Excessive vibration
  • High loads
  • Electrical system faults
  • Loose or dirty terminals
  • Stop/start driving
  • Sulphation

Your local mycar store will:

  • Test your battery to assess its current condition
  • Check and top up the battery electrolyte level (if applicable)
  • Ensure the battery terminal and leads are in good condition
  • Check the alternator charge rate
  • Advise you of any required maintenance

It all starts with the battery so it’s important that the car battery is inspected and tested on a regular basis. This can be done at anyone of our stores for no charge.

Find the nearest mycar store for battery replacements

With over 260 stores Australia-wide you’re sure to find a mycar store nearby for replacing or testing your battery. We have locations in major cities including Sydney, Brisbane and Melbourne, offering Century batteries.

Want to make a booking?

if your car is due for a service or needs any kinds of mechanical repair, then call us on 1300 772 579 to book a service, or Click here to find your nearest store.