The car battery serves the crucial role of supplying power to all the electrical components in your vehicle. Beyond powering lights, media systems, and windshield wipers, it plays a pivotal role in the ignition system, initiating and sustaining the engine's operation.

Several indicators suggest a malfunctioning car battery. If your vehicle fails to start, especially when the engine doesn't attempt to turn over, it could be a sign of a flat battery. Additionally, if none of the electrical components, such as lights, fan, or radio, are operational, it may indicate a drained or damaged battery. Corroded terminals are another red flag, suggesting potential damage or wear. If you notice white or blueish powdery deposits on the battery, it signals acid leakage and incorrect battery operation.

Whilst the initial car battery health check is free. If your car battery requires replacement then a technician will advise further.

However, the cost of replacing a car battery without automatic start/stop functionality in the UK typically ranges from £71 to £279. The specific price can vary based on factors such as your car's brand, model & engine. 

For accurate and detailed pricing for your particular vehicle, it's advisable to contact your local Service My Vehicle.

A car battery typically has an expected lifespan of 4 to 6 years, influenced by factors such as battery quality, weather conditions, vehicle type, and driving habits. When replacing a battery, caution and skill are crucial. Mistakes in handling the electrics can potentially harm the onboard computers of modern cars. It's advisable to follow proper procedures, such as removing negative (black) electrodes first and replacing them last.

The physical condition of your battery itself won't lead to an MOT failure. However, if your car experiences starting, running, or electrical component issues due to battery problems, it could result in an MOT failure.