How we'll fix your flat car battery

We'll find out what's wrong and get you moving again

如果your car won't start, there's a good chance the battery's gone flat. Here's what to do:

1. Double check that it's a flat battery
  • Make sure there's fuel in the tank.
  • 如果the central locking isn't working, your key fob might have died so try a spare key.
  • 如果you can't turn the ignition, check the wheels aren't jammed against the kerb.
2.如果you think it's likely a flat battery, tryjump-startingyour car.
3. If you can't jump start your car, get in touch so we canope体育还没有上线 .

We'll help you get back on the road.


Flat battery

What we'll do to help

如果you've got a flat battery, we won’t justjump-startyou and send you on your way. As well as charging or replacing your battery, we'll try to find out why it went flat in the first place.

如果we can't see why the battery died or we think it's faulty, we'll carry out a battery test. Our test is very thorough and we'll only ever recommend aope体育还没有上线 if you really need one.

Once we reach you, we'll:

  • Test your car battery
  • Look at your car's charging system
  • Check for a fault that could've drained your battery
  • Partially charge your battery or replace it, if required, so you can continue your journey.

Find out more about ourspecialist battery testers here.

Testing your car battery’s health

We get an immediate printout of your battery readings so we can check the condition of the battery.

The different readings can be:

1. Good battery:
  • The fault's not with the battery.
  • We’ll check your car’s charging system and find out why it broke down.

2.A bad cell:
  • Car batteries contain several 2-volt batteries known as cells.
  • 如果一个人不t working, the battery will need to be replaced.

3. Replace battery:
  • This reading is clear - the battery’s just not up to it anymore.

4. Needs charging:
  • This means that your battery's working, but it needs a full recharge.
  • We’ll check your charging system to find out of what drained it.
  • Next, we'll give you a jump start to get the engine going.
  • Before you go, we'll advise how to fully recharge the battery.

5. Consider replacement:
  • Your car battery passed the test - but only just.
  • This means the battery's coming to the end of its life.
  • We'll advise how soon you should change the battery based on how you use your vehicle.

Flat battery test

When to replace a car battery

There's no hard rule about how long car batteries should last or when they should be replaced.

Most batteries will last somewhere between 5 and 7 years. However, our mechanics see cases where the battery has failed after only 2 or 3 years because of how the car was driven.

As a rough rule of thumb:

如果the engine struggles to start before the battery is 5 years old, it probably means:

  • The battery isn't getting enough charge.
  • The car's doing too many short journeys, or
  • There's a vehicle fault draining the battery or affecting charging.

Starting problems after 5 years are more likely to mean:

  • The battery's getting tired and may need replacing.

Find out how breakdown cover can help you if you have car trouble:

Dead battery? We'll replace it the same day with Battery Assist.


Why do car batteries go flat?

Most car batteries fail because they don’t get the chance to recharge properly.

You can halve the battery's lifetime by not fully charging it regularly. This costs you money and risks your car having aopebet .

There are all sorts of reasons for a dead battery, but the most common are:

  • The car hasn't been used for a while
  • The car's only used for short or stop-start journeys
  • The lights were left on
  • There's a faulty component
  • There's a problem with the car’s charging system
  • You've got a fault with the battery itself

Batteries can fail for other reasons, like too much vibration from the engine, over-charging, corrosion andextreme temperatures. Flat batteries are the most common reason whycars won't start in winter.

Plus, modern cars have lots more power-hungry electronics than older cars used to. Think of built-in sat navs, infotainment systems, seat heaters and USB plugs. All of them put strain on the battery.

Broken down in the UK? We’ll rescue you, even if you’re not a Member.

Get help

How to keep your car battery healthy

There are a few ways you can avoid getting a flat battery and help your car's battery last longer:

1. Go for regular drives
  • 30 minutes or more will help the battery recharge.

2.Invest in anintelligent charger
  • 如果you don't use the car much, you can leave these connected for long periods without damaging the battery.

3. Try asolar charger
  • 它不会充电蓄电池,但它会帮助keep the battery charged on a vehicle you don't use much.

4. Switch all electrics off
  • Make sure all electricals like heaters, windscreen wipers and stereo are off when you park or start the car.

5. Dip the clutch
  • Dip the clutch when you start the car to take some load off the starter motor and the battery.

Flat battery help with Battery Assist

In 2018, a flat battery was the second-biggest reason why our Members broke down, and we were called out to more than 300,000 of them.*

Ourope体育还没有上线 will help you whether you're a Member or not. And you can also call us out even if it's not an emergency breakdown.

如果your battery goes flat, we'll charge it or replace it so you can carry on your journey.

*Source: 313,162 AA Attended Breakdowns for batteries, January 2018 – December 2018

Published:7 April 2016 |Updated:11 December 2019 |Author:The AA