Car batteryNew Zealand
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166. Car battery
A car battery is an electrical energy-storage device that supplies power to a vehicle's electrical system. In conventional petrol and diesel cars, the 12-volt starter battery provides the high current needed to start the engine and supplies electrical equipment when the engine or charging system is not providing enough power.
Car batteries gradually lose charge and capacity with age and use. A weak battery can cause slow or unsuccessful starting, electrical problems or warning messages, and the replacement battery should have specifications suitable for the vehicle.
Wikimedia.org • Filipograf • CC BY-SA
What does a car battery do?
A car battery stores electrical energy, supplies the power required to start the engine and supports the vehicle's electrical and electronic systems when necessary.
What are signs of a weak car battery?
Possible signs include slow engine cranking, difficulty starting, dim or unstable electrical equipment and battery or charging-system warnings. Similar symptoms can also have other causes, so the charging system may need to be checked.
Can any replacement battery be fitted to a car?
No. The battery must have specifications and technology suitable for the vehicle. Cars equipped with start-stop systems, for example, may require AGM or EFB battery technology designed for repeated starting and charging cycles.

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