How Long Do Car Batteries Last? 10 FAQ’s About Car Batteries

A recent survey by Kwik Fit found that battery failure is the most common cause of car breakdown in the UK. More than 17% of all issues faced by car owners were battery-related. However, only 4% of them were worried about battery failure. So, by understanding how long do car batteries last, you can avoid unexpected breakdowns and keep your vehicle running smoothly.

In this comprehensive car battery guide, we’ll answer your most frequently asked questions about the lifespan of a car battery. So, without any further ado, let’s get started!

1. How long do conventional car batteries last?

The lifespan of a conventional car battery typically ranges from 2 to 5 years or 30,000 to 50,000 miles. It is a very wide range given that the battery life depends on several factors, including the type of battery, driving conditions, maintenance practices, and climate.

For example, batteries in cars driven mostly on short trips may not fully recharge, while batteries in vehicles parked for extended periods naturally self-discharge. Additionally, extreme temperatures can accelerate battery degradation.

2. How long do electric car batteries last? 

Electric car batteries can last significantly longer than conventional car batteries. The average lifespan of an EV battery is 10-15 years or up to 200,000 miles. But again, it varies with factors such as driving habits, EV battery charging time, and environmental conditions. Things like frequent use of fast charging and extreme temperatures can accelerate EV battery degradation.

3. How long do hybrid car batteries last?

Hybrid car batteries typically last between 5 and 8 years or 75,000-100,000 miles. This lifespan is longer than that of conventional car batteries but shorter than that of electric car batteries. Hybrid car batteries are somewhat similar to electric car batteries, which generally have higher capacities. However, due to the added complexity of hybrid powertrains, they usually don’t last as long.

4. Why do car batteries have a limited lifespan?

Car batteries have a limited lifespan due to a combination of factors:

• Age: Over time, the internal cells of a battery can deteriorate, leading to reduced performance and, eventually, failure.
• Corrosion: Exposure to moisture, salt, and other corrosive elements can cause corrosion on the battery terminals, leading to poor electrical conductivity and reduced battery life.
• Battery degradation: Repeated charging and discharging cycles can gradually reduce a battery’s ability to hold a charge. This is known as “battery degradation.”
• Parasitic battery discharge: Even when a car is turned off, there may be a small electrical draw from accessories like clocks, alarms, or computer systems. Over time, this parasitic discharge can deplete the battery’s charge.

5. What other issues can be confused with a dead car battery?

Here are some other issues that can be confused for a dead car battery:

• Faulty alternator: If the alternator has gone bad, it won’t allow the battery to charge properly. Many people mistake it for a dead car battery and replace the battery instead of the alternator.
• Loose or corroded battery terminals: Poor connections can prevent the battery from charging properly. In this case, you’ve got to change the terminals and not the battery.
• Momentary high-amperage draw: Certain accessories, such as powerful sound systems or lights, can draw excessive current and drain the battery. It’s just momentary, and it doesn’t necessarily mean that the life of your battery has ended.
• Faulty starter: A faulty starter can prevent the engine from starting, even if the battery is fully charged. Don’t confuse it with a dead car battery.

6. What are the symptoms of your car battery going bad?

If you experience any of these symptoms, your battery is likely going bad:

• Dashboard Warning lights: If your car’s battery warning light comes on, it’s a clear indication that there’s a problem.
• Long starting time: If your car takes longer than usual to start, it could be a sign that the battery is weak.
• Engine cranking but not starting: If the engine cranks but doesn’t start, it’s likely due to a weak battery.
• Car lights not bright: If your car’s lights are dimmer than usual, it could be a sign that the battery is not providing enough power.
• Visual appearance: Check the battery for signs of corrosion or swelling. These can be indications of a failing battery.

7. What causes a car battery to go bad?

Car batteries can go bad due to a variety of factors, including:

• Inactivity and short trips: The number one cause of a dead car battery is inactivity for prolonged periods, not driving your car regularly, or frequently driving your car on short trips. If you don’t drive your car at least once a week for 10 miles or longer, you’re calling for battery troubles.
• Extreme temperatures: Both hot and cold weather can shorten battery life.
• Poor maintenance: Ignoring corrosion and small things like loose terminals can also cause the battery to go bad. At times, incorrect jumpstarting can also damage the battery.

8. How can you extend the life of a car’s battery?

Here are some tips to extend the life of your car battery:

• Take longer trips: Regular longer trips help ensure the battery is fully charged. Short trips may not allow the alternator to recharge the battery completely.

• Battery maintenance:

• • For lead-acid batteries, check the electrolyte levels regularly and add distilled water if necessary.
  • Remove corrosion from the battery terminals and tighten them securely.
  • Avoid overcharging, as it can damage the battery.
• Avoid extreme temperatures: Both hot and cold temperatures can affect battery performance, so to extend its life, always make sure to park in a shaded area.
• Consider a deep-cycle battery: If you frequently use your car for activities that require prolonged battery power, such as camping or off-roading, a deep-cycle battery may be a better option.

9. How much does it cost to replace a car battery in the UK?

The average cost to replace a car battery in the UK is £150 and typically lies between £100 and £200 depending upon your battery size and model. You can expect to pay between £3,000 to £15,000 for electric car batteries, whereas a hybrid car battery costs around £2,000. The battery prices for electric and hybrid cars vary widely due to variations in size.

An important thing to remember about battery replacement is that insurance companies see them as part of regular maintenance, so they don’t usually cover it. You have to cover the battery replacement cost for all cars from your pocket unless there’s some warranty left on it.

10. Does the condition of a car battery affect its value?

The condition of a car battery can affect the car’s value, but usually, it is no more than 2-3% because it is an inexpensive replacement. Many car batteries come with warranties that cover defects or premature failure. So, if a battery is still under warranty, it can usually be replaced at no cost.

If you’re worried about the current valuation of your car, our car valuation tool can help you get a more accurate estimate of your car’s worth.

Wrapping Up: How Long Do Car Batteries Last?

By following the tips and information provided in this guide, you can help extend the lifespan of your battery and ensure you’re always ready to hit the road.

Always remember that regular maintenance is the key to avoiding car issues. By regularly maintaining your battery, you can enjoy a longer car battery life.