£214.35
Average price for this repair in London in the last 30 days^
Trustpilot rating for all RAC Mobile Mechanics.
Why choose the RAC for a car battery replacement?
At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running.
Plus, with RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage when you need a repair. We’ll come to you, at your home or work.
Our top pick in London
RAC Mobile Mechanic in London
At the RAC, we’ve got over 125 years’ experience in offering complete peace of mind to our members. We’re best known for our breakdown service. And now – our new RAC Mobile Mechanics are here to help make every day motoring easier. If you need a service or repair, they’ll come to you at your home or work.
Book a car battery replacement
If your car won’t start due to a dead or failing battery, our mobile mechanics can test your battery, provide a replacement, and install it on the spot at home or work, saving you the hassle of going to a garage.
Book a diagnostic
For when you know something isn’t right, but you’re not sure what – our mobile mechanics are here to help.
And it’s not just car battery replacements that we do in London
Mobile mechanics bring the garage to you, saving you the hassle of getting your car to a garage. If you need a service or repair, they’ll come to you at your home or work.
Try one of our RAC Approved Garages
Millennium Garages Ltd - RAC Approved Garage
West Hampstead Motors Ltd
MNS Autos Ltd
Frequently asked questions on car battery
Charging your electric car battery involves:
- Plugging into a charger: Use a home charger or a charging station.
- Monitoring charging: Most electric cars have a display to show how charged the battery is.
- Charging time: This varies depending on the charger and your electric car’s battery. Home chargers typically take six to eight hours. Fast chargers can take 30 to 60 minutes.
Always follow the guidelines for charging.
To change your car key battery:
- Open the key fob: Use a small screwdriver or coin to open the fob.
- Remove the old battery: Take note of the battery type.
- Insert the new battery: Make sure it’s the correct type and is oriented as it should be.
- Close the key fob: Snap or screw it back together.
Check your car manual for exact instructions.
Yes. You can replace a car battery on your own if you follow these steps:
- Turn off the engine: Make sure your car is off.
- Remove the old battery: Disconnectthe negative (-) terminal first. Then disconnect the positive (+) terminal. Remove any clamps or brackets holding your car’s battery in place.
- Install the new battery: Place your new battery in the tray. You can then secure it with clamps or brackets. Connect the positive (+) terminal first. Then connect the negative (-) terminal.
- Test the battery: Start your car to make sure the battery is working.
If you’re unsure, use a professional service.
Signs you need a new car battery include:
- Slow engine cranking: The engine takes longer to start.
- Dim lights: Headlights and inside lights are dimmer than usual.
- Battery warning light: The battery or charging system warning light is on.
If you notice any of these signs, it’s time to get your battery checked.
The best car battery depends on your car and how you drive:
- Standard lead-acid battery: Suitable for most cars with regular driving patterns.
- AGM battery: Ideal for vehicles with high electrical demands or stop-start systems.
- Deep cycle battery: Used in electric and hybrid vehicles.
Read your car manual or ask a professional for recommendations.
Most car warranties cover battery replacement for a period. This is usually two to three years. Extended warranties may offer you longer coverage. Check your warranty details or talk to the provider for more info.
Yes, it certainly can:
- Cold weather: Low temperatures can decrease the battery's ability to hold a charge, making it harder to start the car.
- Hot weather: High temperatures can cause battery fluid to evaporate, leading to potential damage.
Regular checks are important in extreme weather.
Recycling an old car battery is important for environmental reasons as it can be very polluting.
- Take it to a recycling centre: Many auto part stores and recycling centres take old car batteries.
- Check local regulations: Some areas have specific guidelines for battery disposal.
- Use a professional service: Many mobile mechanics and garages offer battery recycling services.
- Lead-acid battery: Common, cost-effective, and reliable for most vehicles.
- AGM battery: More expensive. It offers better performance and durability, in vehicles with high electrical demands or stop-start systems.
Talk to a professional to find the best battery for your needs.
Browse other top locations and makes across our network in the UK
Filter by