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We stock premium-quality car batteries from a wide range of trusted manufacturers, including Exide, Bosch and more. Find a battery fit for your vehicle’s make and model with Euro Car Parts.

What is a car battery?

A car battery is the central power system for your car, giving your vehicle the juice it needs to get moving. It stores chemical energy and turns it into the electrical energy that starts your car and powers all the electronics like the lights, radio and air-conditioning.

When you turn the car key in the ignition, you trigger a chemical reaction that releases electricity. The electricity generated powers the car’s starter motor and spark plugs, igniting the fuel mixture in the combustion cylinders. As you drive, the car recharges the battery through the engine’s alternator by converting the mechanical energy into electrical energy.

The main types of car battery you’ll see are lead-acid batteries, AGM batteries, EFB batteries, and lithium-ion batteries. Read more advice on finding the right car battery for you.

How long should a car battery last?

Car batteries are designed to last anywhere from 3-5 years, but waiting until the point where your battery fails can cause you extra stress. Recognising the early warning signs will help make sure you can replace your battery before it's too late;

Slow engine starting, or needing to jump-start your car more often
Dim or flickering lights
Engine light illuminated on your dashboard
Visible swelling on the battery when looking under the bonnet

How can I extend my car battery life?

With proper care and maintenance, you can significantly extend the lifespan of your car battery and prevent any unexpected failures. Here are some of our top tips:

Drive regularly – if your car sits unused for long periods, the battery will start to lose charge.
Turn off accessories whilst idling – running your heating or listening to the radio whilst sat idling can strain the battery and cause it to drain faster.
Clean battery terminals – check them regularly for any corrosion (this will look white or greenish) and clean terminals using a wire brush and a mixture of baking soda and water.
Test voltage – have your battery tested regularly to make sure it’s still healthy.

Useful car battery terminology

When looking for a replacement car battery, you’ll come across a lot of technical terms. We’ve broken down a few of the most important ones to help you in your search:

CCA (Cold Cranking Amps): the maximum power the battery can deliver at a freezing temperature. The higher the number, the better your car will start in cold weather.
AGM (Absorbent Glass Mat): premium battery type where the acid is absorbed into fibreglass mats, making it spill-proof and highly durable. This is most common in cars with start-stop systems.
Ah (Ampere-hour): the measure for the energy storage capacity of a car battery, showing how long it can power your vehicle before needing a recharge. The higher the Ah, the longer the battery’s power supply.
EFB (Enhanced Flooded Battery): an upgraded version of a traditional lead-acid battery, specifically built for modern cars with a start-stop system. This type has a longer life than standard batteries at a lower cost than AGM batteries.

FAQs

How much does it cost to replace a car battery?

The cost of replacing a car battery can change depending on your car’s make and model and its battery requirements. To find the exact cost of the right battery for your car, use our handy registration lookup tool to tailor the results to your needs.

How do I make sure I order the right car battery for my car?

Use our vehicle registration lookup tool at the top of this page to filter for the correct battery for your car. You can also check your user manual to find the exact parts you’ll need.

Can I fit a car battery myself?

Without a battery, your car simply won’t start – so you should only attempt to replace your car battery if you have the relevant tools and are experienced enough. We recommend getting your car battery fitted professionally to ensure its proper functionality.

You can also consult your vehicle’s manual for specific battery replacement instructions and requirements.

Renault 21 Car Battery

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