Book a Car Battery Replacement & Fitting for your Porsche

£274.38

Average price for this repair for your Porsche 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 for your Porsche

We’ll come to you at home or work

RAC Mobile Mechanic for your Porsche

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.

Car battery replacement

From £160³

^{^^}FREE Bosch wiper blade replacements with any repair at home until 24/11/25, 09:00. Worth £45.
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.

Vehicle diagnostic check

£99

For a limited time, get £50 off repairs over £150 when you book a diagnostic test. Offer ends 09/12/25, 09:00.^**
Our mobile mechanics will spend up to 30 minutes checking your car for faults and talk you through any repairs you might need and give you a report for your records.

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.

And it’s not just car battery replacements that we can do for your Porsche

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

Ian Bright Motor Engineer

4.7/5

Ian Bright Motor Engineers is a friendly independent garage situated in a beautiful countryside location in Halnaker, Chichester. Established since 2013, our small team are dedicated to delivering you the highest levels of customer service. Our workshop is fully equipped and we cater for all makes and models of vehicles, offering our customers a comprehensive range of repairs, maintenance work, servicing and MOT’s. Owner Ian has over 47 years of experience, having started his 5 year City & Guilds apprenticeship back in the 70’s. City and Guilds qualifications are a lot more intense and labour intensive compared to the more modern qualifications available to mechanics nowadays, and we were taught how to fix and repair parts as opposed to simply replacing them, which is standard practice in most places today. I have experience working with older classic cars, alongside newer more modern ones too, and no job is too big or too small for us to take on! Most of my customers have been with me for years and know that by choosing my company to undertake works on their pride and joy, they will receive fantastic workmanship alongside a personalised service. We would never advise you doing anything to your vehicle which was unnecessary as some garages do purely for profit, priding ourselves on our honest core values. My son, who was trained in-house alongside me, has branched out into classic and vintage race cars and is fast gaining a fantastic reputation for his first-class trimming, and my eldest grandson Lewis is now working with me and is undergoing his apprenticeship too. Three more grandsons are also looking to come on board and keep this garage running with a strong family presence.

Unit 2 The Workshops, Thicket Lane, Halnaker, PO180QS

RSC Ltd.

4.5/5

We have on site a fully equipped three ramp workshop. Our work shop philosophy is very old school, we will never carry out any work to your vehicle unless it is needed, always ask your permission to carry out any work up and above what has been agreed and do our utmost to give a fair and reasonable cost service at all times. As a result of this we have a loyal database of customers from Rickmansworth, Watford, Northwood, Hatch end, Bushy and surrounding area. We offer a wide variety of services at an extremely competitive rate especially when compared to the main dealers, these include: servicing, repairs, bodywork, tracking, tyres, air conditioning re gasses, clutches, brakes, exhausts, car audio and alarms.

Oxhey Drive, South Oxhey, Watford, WD197SE

Witney Vehicle Repairs Ltd

4.6/5

Here at Witney Vehicle Repairs we have over 30+ years of experience, pride ourselves on our commitment to give the very best in car repairs, servicing, diagnostics, & customer satisfaction. Our pricing is very competitive with no hidden surprises, We look forward to earning your trust & gaining your custom. And now we are proud to announce we have become an RAC approved garage offering RAC inspections, repairs and other RAC products. Also we are part of the RMI & and trust my garage network, We are now offering a Shell / Forte vehicle service, parts & preventative solutions package please contact us for more information.

Witney Road, Standlake Business Park, Witney, OX297PR

Diplock Fuel Injection Services Ltd

5.0/5

We at Diplock Fuel Injection Services Ltd are a professional and friendly company based in Hailsham. Established since 1985, with individuals having over 50 years experience our car mechanics offer an array of car maintenance services. We specialise in diesel fuel injection and MOT testing, and can offer a comprehensive selection of repair work. We have built up a highly sought-after reputation and we come highly recommended by people in the trade. We also pride ourselves on offering very good rates on MOT tests; so please contact us for an unbeatable price!

Unit 3/4 Avocet Way, Diplocks Way, Hailsham, BN27 3JF

A1 Motorsports Ltd

5.0/5

At A1 Motorsports ltd, we pride ourselves in repairing vehicles to a satisfactory standard. Using our knowledge and diversity of skills, our services we offer range from Servicing too full engine rebuilds including timing chains and timing belts Based in Longfield/Dartford, with the necessary tools needed to repair a large variety of vehicles.

Chalk Croft Transport Yard, Longfield, Kent, DA28DX

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.