Just like with most things, batteries have a lifespan. As it starts to wear out, it usually gives you a few clues, but how do you know when it’s time to wave goodbye to your current battery and say hello to a new one?
In this blog, we'll explore the common symptoms that suggest your battery may be on its way out and offer tips on how to maintain it for a longer lifespan.
Common Signs of a Dying Car Battery
When your car battery begins to fail, it’s not always obvious at first. However, there are several key things that can alert you before it completely dies. Paying attention to these early signs not only helps prevent a frustrating breakdown, but it also gives you time to replace the battery before it leaves you stranded.
1. Failure to Start
If the car doesn’t respond when you turn the ignition on, your battery might be dead. This is often the first clear sign that your battery is no longer working.
2. Engine Struggling to Start
While not as severe as a completely dead battery, if your engine makes a strange or concerning noise when you turn the ignition on, or if it takes longer than usual to start, your battery could be weak and on its way out.
3. Warning on the Dashboard
We’ve all experienced the dreaded sight of warning lights illuminating the dashboard. If the little battery icon lights up on your dashboard, it’s not just for decoration, it’s your car’s way of saying something’s not quite right, suggesting the need for attention or replacement.
4. Frequent Jump Starts
Needing to jump-start your vehicle more often than usual is one of the clearest car battery problem signs. If you find yourself frequently relying on jump starts, it’s probably time to think about replacing your battery before it completely dies.
5. Electrical Faults
Electrical problems, such as dimming lights or malfunctioning electrical components, can be a sign of a failing battery. If you experience consistent electrical issues, it might be time to check or replace your battery.
How Long Do Car Batteries Last?
Most car batteries last between 3 to 5 years, but that depends on your driving habits, climate, and maintenance. Cold months and short trips can wear your battery down faster.
If you’re an everyday driver, it’s a good idea to start checking your battery annually after the 3-year mark. Regular checks, especially before winter, can help you catch any issues early and avoid those frustrating, unexpected breakdowns.
What About Electric Vehicles?
EV batteries typically last much longer than traditional car batteries, usually 8 to 10 years, or even more, depending on the make and model.
They work by relying on advanced lithium-ion technology designed for long-term durability and efficiency. However, how you charge, drive, and store your EV can still affect battery lifespan over time.
So while EV drivers don’t need to worry as often, regular battery health checks and smart charging habits still go a long way.
Why Do Car Batteries Fail?
Car batteries can fail for a number of reasons, and often at the worst possible time. Understanding what causes battery issues can help you avoid being left stranded:
1. Battery Sulfation
When a battery stays undercharged for too long, sulphate crystals build up on the internal plates. This makes it harder for the battery to hold a charge or deliver power.
What to watch out for: Sluggish starts, dim lights, or a battery that doesn’t hold a charge even after driving.
Can it be fixed? Sometimes. Special chargers can reverse mild sulfation, but advanced build-up usually means the battery needs to be replaced.
2. Parasitic Drain
Even when your car is off, some systems still use a little bit of power. But if something is faulty, it might drain your battery too much.
What to watch out for: A battery that goes flat overnight or after a day or two of not driving.
Can it be fixed? Yes. An auto electrician can test for a parasitic draw and repair the faulty component.
3. Corrosion/Loose Connections
Corrosion on the battery terminals or loose cables can stop the battery from charging properly and reduce power flow to the engine.
What to watch out for: Powdery white or green build-up on the battery terminals, or cables that feel loose.
Can it be fixed? Yes. Cleaning the terminals with a battery brush and tightening the connections usually sorts it out. Use anti-corrosion spray to help prevent it happening again.
4. Extreme Temperatures
Heat speeds up battery wear, and cold makes it harder for the battery to work, especially when starting the car.
What to watch out for: Slow starting in winter or a sudden flat battery in summer.
Can it be fixed? Not once the damage is done, but insulating the battery and choosing one suited to the climate can help.
5. Old Age or Short Trips
All batteries have a shelf life, and underuse or constant short trips prevent proper recharging, wearing the battery down faster.
What to watch out for: Needing frequent jump starts or poor performance even after charging.
Can it be fixed? No, if the battery is past its lifespan a eplacemrent is the best option.
What To Do If Your Car Battery Fails?
If your car won't start, the most likely culprit is a flat or faulty battery. Look out for the signs mentioned earlier, for how to tell if your car battery is dead or on its way out, like a slow engine start or dashboard warning lights.
If you have jump leads and access to another vehicle (or a jump starter), you can try to jump-start the car. If successful, let the engine run for at least 20 minutes to help recharge the battery. Keep in mind, this may only be a temporary fix.
If the car still won’t start, or you’re unsure what to do, it’s best to call for roadside assistance, which can help and advise accordingly.
Is Battery Health Checked During a Service?
The aim of a service is to ensure your vehicle is running at its best and is recommended every 12,000 miles or 12 months, whichever comes first. At JCT600, we offer three different service types: Interim, Full, and Major. What’s included in each service can vary depending on the make of your vehicle, so to find out which option is right for your vehicle, contact your local JCT600 dealership.
Most of our lives revolve around our cars, which is why booking a regular service is essential to keep your vehicle running at its best.
Alternatively, we also offer a complimentary Vehicle Health Check, free of charge, where our technicians inspect key areas of your car, including brakes, tyres, and more. Each finding is rated using a clear traffic light system, helping you make informed decisions about any necessary next steps.