03/12/2021
11. Flat or faulty battery
Battery faults are the most common cause of breakdowns – especially in the winter.
If you’ve got a problem with your battery, you might not be able to start your car. A car's battery powers the starter motor, and then the engine turns the alternator, which recharges the battery.
Flat batteries are commonly caused by leaving the lights on when the engine's off. But there’s also a good chance battery problems will be down to lots of short journeys or a poor electrical connection.
Batteries can go flat due to:
Leaving your car unused for a while, or only used for short journeys
A faulty component
A problem with the car's charging system
A fault with the battery itself
Old age
How to avoid a flat battery
Don't forget to switch everything off as you leave the car. Removing the ignition key may not switch off the lights, but most modern cars have a 'lights on' warning sound as you open the car door.
If you don’t make long journeys very often, your battery won’t have much chance to charge. You can sort this out by charging it overnight every 2 weeks or so. We offer an easy-to-use Battery Maintainer you can buy online.
When your car's serviced, the garage should check that connections are secure and that the battery terminals are clean and protected from corrosion.
Also, most car batteries have a guarantee of 3 to 5 years, so you're living on borrowed time after then. Replace it before it lets you down.