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Why Does My Cars Battery Keep Dying?

Updated: Feb 11


Why does by battery keep dying?

There are many reasons why your cars battery can fail but here are the most common.


Headlights lights left on​​​.

  1. Headlights or interior lights being left on will drain a battery overnight.

  2. Make sure to check for any interior lights are left on by mistake.

  3. Some headlights are designed to remain on for a while, but a malfunctioning system may leave them on permanently, Keep an eye on them to be sure.

Battery in weak or poor condition.

  1. ​A poorly maintained or weak battery may not hold a charge very well.

  2. Even small drains, like the memory function in your car radio, may kill a very weak battery.

Corroded or loose battery connections.

  1. ​Corroded battery connections can prevent the charging system from topping off your battery when you are driving.

  2. Loose battery connections can also cause problems.


Other parasitic drains in the electrical system.

​ 1.Parasitic drains can be difficult to find, but they are fully capable of killing batteries dead.

2.Common drains include glove box and trunk lights that come on, or remain on, when they shouldn't.


Extremely hot or cold temperatures.

1.Hot or cold weather won't kill a battery that's new or in good shape, but a weak or old battery may fail in extreme conditions.

2. Extremely hot or cold weather can also magnify other underlying issues.


Charging system problems.

1. If a battery seems to die when you're driving, the charging system may be at fault.

2. Loose or stretched belts and worn tensioners can prevent an alternator from working.


There are lots of ways you can prevent your battery from dying, but batteries do have a shelf life and will at some point require replacement. Car Friend can test your vehicles battery and give you an indication on the health of your battery and the state of charge. In fact this is standard on our services. Battery tests are free and can be done in a matter of minutes.


When you buy a battery from us, it will always come with a warranty. The minimum is three years up to 5 years. This means should your battery fail in this time we will replace it free of charge for you. This comes as standard and won't cost you any extra.


For more information on batteries including a fixed price replacement for your car , call us on 01543 276060.


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