Book a Car Battery Replacement & Fitting in Windsor

£242.63

Average price for this repair in Windsor in the last 30 days^

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for a car battery replacement?

With RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage. They can do battery replacement and fitting on your driveway, so you don't even need to leave the house.

We use only quality batteries that meet OEM standards – that means they meet your vehicle manufacturer’s strict quality criteria, with a minimum 3-year warranty as standard. The price includes fitting, ensuring no surprises on the day. No hidden costs, just friendly, honest experts.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in Windsor

We’ll come to you at home or work

RAC Mobile Mechanic in Windsor

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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.

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Car battery replacement

From £160^††

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.

OEM quality parts

We use original equipment manufacturer (OEM) standard parts, which means every new part will be the same standard and same quality as the original part it replaced.

Mechanics you can trust

Our mobile mechanics are friendly, honest, and backed by the RAC.

FREE fuel efficiency treatment

Get a FREE fuel efficiency treatment worth £20 when you book any repair. Offer ends 01/06/26, 9am.

Vehicle diagnostic check

£99

We’ll spend up to 30 mins checking your car’s onboard management system for faults. We’ll talk you through repairs needed and provide a full report. If any further work is needed, we’ll agree this with you before we start. Any additional work after the first 30 minutes will be priced at £20 per 15 minutes. We’ll agree this with you before proceeding.

Diagnostic check

We’ll look for any mechanical or electrical problems. If we need to, we’ll also check your car’s onboard engine management system. Depending on your car and issue, this will usually include: – Engine – Power steering – Brakes – Transmission – Exhaust system – Fuel injection system – Cooling system and air flow – Sensors

Full error report and advice on repairs

If we detect any issues, we'll talk through what needs to be repaired. We’ll give you a no-obligation quote to fix it on the spot, if we can. Or we’ll recommend a local RAC Approved Garage, and give you a full error report to take there.

Average cost of a car battery replacement by car make^

The cost to replace your car battery will depend on the car you drive and battery recommended. According to RAC data, the average cost to replace a car battery is £214. But you can check out the average price of a car battery replacement for your specific car make here.

Make	Average price
Ford	£230
BMW	£286
Volkswagen	£230
Mercedes	£258
Nissan	£224
Toyota	£234
Audi	£270
Vauxhall	£226
Peugeot	£235
Land Rover	£266

^Average price quoted for RAC Mobile Mechanics from 01/01/25 to 31/03/25.

And it’s not just car battery replacements that we do in Windsor

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.

A close up of an RAC mobile mechanic looking under the hood of a car

What our expert says

A healthy battery will help you avoid breakdowns and keep your car in top condition. An old worn battery can cause starting issues and could fail any time – leaving you stranded.

Nick Mullender

Lead RAC Mobile Mechanic

Try one of our RAC Approved Garages

View all garages

CRW (Car Repair World)

Independent, RAC Approved Garage. We carry out ALL Mechanical, Bodywork and Electrical repairs. We carry out Warranty Repairs and Insurance Repairs. We specialise in Timing Chains/Belts, Engine Repairs, Gearbox Repairs, Clutches, Brakes, Suspension, Alternators, Starter Motors, Turbos, Exhaust, Servicing, BodyWork, Electrical, and much more. We are an Accident Repair Centre, repairing vehicles to manufacturer standards. We also carry out work on Vans and Commercial vehicles. Our address is: Unit C, Riding Court Farm, Riding Court Road, SL3 9JT. We are open Monday - Saturday 9am - 7pm. CarRepairWorld. Co .uk

Unit C, Riding Court, Slough, SL39JT

Reliance Autotest Slough

Looking for top-notch car servicing in Slough? Look no further than Reliance Auto Test Slough Ltd! We are your go-to experts, ready to handle all your MOTs and car servicing needs with precision and care. Located right here in Slough, our team is dedicated to keeping your vehicle in peak condition so you can hit the road worry-free. Our commitment to excellence means you can trust us with your car maintenance needs. Whether it’s a routine check-up or a repair, we’ve got you covered. Say goodbye to endless searches for reliable and efficient service – Reliance Auto Test Slough Ltd is here to make sure your vehicle gets the attention it deserves. Don’t let car troubles slow you down; contact us today for the MOTs, car repair and servicing in Slough that will keep you rolling smoothly down the streets!

Unit 14 Slough Interchange, Wittenham Close, Slough, SL2 5EP

Maidenhead Auto Repair Centre

Maidenhead Auto Repair Centre are an established local independent garage and are proud to be members of Autofirst Network – a nationwide network of independent garages operating to the Network’s 6 core values of Capability, Consistency, Care, Clarity, Cost Effectiveness and Customer Focus. For your added peace of mind we are members of the Motor Ombudsman service which is approved by The Trading Standards Institute. In short, we are a local garage you can trust offering you the support and service guarantees of a national network, giving you complete peace of mind. Since 1985, we have been building our Maidenhead garage and investing in the latest equipment so that we’re always one step ahead. We specialise in all makes and models of vehicles for Servicing, Mechanical Repairs, Bodywork and Accident Repairs plus MOT’s, Valet Services and Fleet Cars, which has enabled us to become the largest independent auto repair centre in Maidenhead. Our Maidenhead repair workshop is fully equipped with the latest technology to carry out all types of mechanical work from routine servicing to major overhauls and repairs. We accommodate four separate working bays all with hydraulic lifts and exhaust gas extraction. Each station employs its own fitting bench and full set of tools For body work, all spraying is carried out in our Nova Verta Booth which is large enough to accommodate all cars and Light Commercial Vehicles (LCV’s). We also have built in infrared heaters which allow the booth to perform low temperature baking to ensure a durable finish. If you’re looking for bodywork repairs in Maidenhead, then you’ve come to the right place.

M.A House, Cordwallis Street, Maidenhead, SL6 7BE

Fir Tree Autocentre (ub7)

As a reliable, local garage, we provide a range of car services for our customers. This includes MOT's, engine diagnostics, car servicing and car repairs at affordable prices. We work on providing low-cost repairs and services without affecting the quality of our work. As a result, we tailor our car services specifically to your vehicle and your driving needs. Our team take the time to talk each customer to make sure we can understand your needs and budgets in the hope that we can provide quality car services for every customer that walks through our door. All our mechanics who work for Fir Tree Autocentre in West Drayton are highly trained to the highest standard. This allows us to help worried car owners with any car problems they might be having. In addition to this, it allows us to work on any make or model of car and never have to turn a customer away. Keeping up to date with the latest tools and technology allows for more efficient and accurate repairs. In other words, we make sure our customers get their cars back on the road as soon as possible.

Unit 3-4 Horton Close, West Drayton, UB78EB

IN'n'OUT Autocentres Bracknell

At IN’n’OUT Autocentres we offer fixed prices MOTs and Servicing for any make and model of car with no hidden extras. We are proud to be a ‘Which? Trusted Trader’ so we are really a garage you can trust. We also have a 5 Star Trustpilot reviews rating. We provide OEM parts and 12 months warranty on all parts and servicing. We only use premium Castrol oils in all servicing. Our services are all completed ‘while-u-wait’ so you have never have the inconvenience of losing your car for the day. You can watch your car as it is being worked on through the viewing window or sit back and relax in our clean and comfortable customer lounges with FREE Wi-Fi and coffee and read the latest magazines. Check out our latest reviews and BOOK NOW!!

Unit 5B Western Trade Centre, Western Rd, Bracknell, RG121RW

Frequently asked questions on car battery

How to charge an electric 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.

How do you change a car key battery at home?

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.

Can I replace the car battery myself?

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: Disconnect the 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.

How do I know my car battery needs replacing?

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.

What is the best type of car battery for my car?

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.

Is a car battery replacement covered under warranty?

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.

Can extreme weather affect my car battery?

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.

How do you recycle an old car battery?

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.

What’s the difference between a lead-acid battery and an AGM battery?

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.