How to Charge a Car Battery

A battery warning sign appearing on a vehicles dashboard.

How long does a car battery last?

On average, a car battery can last from 3 to 5 years, however it can completely depend on how well it has been maintained, the motorists driving style and the pressures that its under from the engine.

How long does it take to charge a car battery?

You are probably wondering how long it takes for car batteries to charge, it can differ depending on the batteries amps and charger that you’re using.

To work out how long it’ll take you need to divide the battery’s rating by the charging rate.

High speed charging is usually 6-10amps, whereas low speed charging is typically 2-3amps which is usually for a gradual overnight charge.

Before you begin to charge the battery, ensure that you clean the posts and check its electrolyte level as you may need to top them up. This will extend the batteries life and will reduce any risks of excessive gassing and bubbling.

We recommend that you opt for a slower charge to prevent the risk of the battery plates becoming buckled.

How do you charge a car battery?

Follow our step to step guide so you can charge your car battery.

You should never charge leaking or damaged car batteries.

Firstly, you need to check what car battery charger you need. If you have an AGM or EFB battery you will need a smart charger.
If the lead terminals that come out of the battery look dirty or corroded, ensure that you clean them before you change the battery over.
We recommend that you disconnect the battery before you charge it. Make sure you’ve got the codes for your electrical components as they might reset when you disconnect it.

To prevent any shocks arising, disconnect the negative lead first then reconnect it last.

Undo the clamps that connect the battery to the terminals by loosening its bolt on the side.

Connect the battery charger’s cables to the battery by matching positive to positive and negative to negative. When they have been secured, plug the charger in. Ensure that the battery and the charger are as far away as possible. Remember to never leave the charger on top of the battery.
Now you are ready to switch the charger on. Always check the chargers manual to see if they need to be switched off manually or if they go off automatically when the battery is charged

Take a look at our battery chargers or get a new car battery.

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