Checking your car battery is a straightforward process, and there are a few methods to ensure it's in good condition.
However, it is important to remember that the battery is an essential and potentially dangerous component, so if you are unsure, leave it to the mechanic, or take it to a trusted local garage.
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Before you get started, check for any leaks. Any fluid coming from the battery could be acid leaking out of it, which requires immediate attention from a skilled mechanic as it can cause serious damage to surrounding components and is harmful to skin.
Whilst you are doing that, look for any corrosion or white or grey deposits around the battery terminal.
Corrosion can prevent proper contract with the battery’s electrical connectors and should be cleaned off. This will require a specialist cleaning formula. An experienced mechanic will know what to do.
The car battery is usually located on either side of the engine bay, sometimes under a plastic or fabric cover, and will be obviously marked.
It is important to check the battery case for any visible cracks or bulging. If the battery’s outer casing is damaged, it will likely need replacing.
Before you check the rest of the system, ensure the battery terminals are securely connected. Loose connections can cause intermittent starting problems – and damage the battery over a period of time.
At a garage – or with a mobile mechanic – a handheld battery tester can be used.
This is a tool specifically designed to check the health of your car battery. It usually provides a quick reading on the battery’s charge and health.
It will state whether it is weak or needs replacement. If this isn’t the case, then there is likely another issue with the vehicle.
Your car owner’s manual will tell you what the reading should be if the battery is in good health.