Batteries
Mobile car battery replacement, fitted where you are
Batteries from reputable brands, including AGM and EFB for stop-start cars, fitted at your home or workplace across Berkshire, Surrey and Hampshire. Get a quote online — we’ll confirm your price on WhatsApp.
- Battery maker’s warranty of up to 6 years
- Free at-home fitting
- Fitted by qualified mechanics
About this service
Mobile battery replacement and testing
Fast mobile battery replacement from our bases in Farnham, Guildford, Maidenhead, Reading and Basingstoke, covering Berkshire, Surrey, Hampshire and the surrounding areas — with free at-home fitting.
We fit AGM and EFB batteries for stop-start cars as well as standard batteries, code the new battery to your car after fitment where needed, and offer full alternator and charging system testing.
Your battery is supplied and fitted by one of our own mechanics — we never subcontract. Our mechanics are qualified to NVQ Level 3 equivalent and fully insured. The team includes manufacturer training with Volkswagen Group, Citroën and BMW, and more than 20 years’ combined experience in the motor trade.
Electrical fault or warning light that won’t go away? Book a diagnostic check, or see our engine & mechanical repairs.
- AGM, EFB and standard batteries
- Alternator and charging system testing
- Fitted at your home or workplace
Batteries
Battery services
Prices depend on your car and the battery it needs. Get a quote online for the battery you need — we’ll confirm your price on WhatsApp.
Battery — AGM / EFB
For stop-start vehicles (AGM/EFB specification).
Battery — Standard (non stop-start)
Conventional lead-acid replacement.
Battery Coding
Electronic registration/coding after fitment.
Battery types
AGM, EFB or standard: which battery does your car need?
Cars with stop-start use an AGM (absorbent glass mat) or EFB (enhanced flooded) battery, built for frequent restarts. Cars without stop-start normally use a standard (flooded) lead-acid battery. Not sure which yours has? Send us your reg on WhatsApp and we’ll tell you.
Battery makers’ general advice is to replace like with like. A car that came with an AGM battery should get another AGM. A car designed for an EFB can take an EFB, or in many cases an AGM as an upgrade, but a stop-start car shouldn’t be given a standard battery: the wrong type can stop the stop-start system working properly or shorten the battery’s life.
Many modern cars, especially stop-start models, also need the new battery registered (coded) to the car after fitting. On these cars the battery management system adjusts how it charges the battery as the battery ages; registering the new one tells the car to start afresh, so the battery is charged correctly. We can do that for you where it’s needed.
How it works
How to book a battery replacement
Start with your reg, then confirm your price with us on WhatsApp. See how it works and how our pricing works.
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Enter your reg
We look up your car’s make, model and engine.
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Choose your battery
AGM / EFB for stop-start cars, a standard battery, or battery coding.
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Get your price on WhatsApp
Send us your reg and the battery you need — we’ll confirm your price and a time that suits you. You pay when the job’s done.
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We come to you
At your home or workplace.
Prefer to talk first? Call or WhatsApp us — Mon–Sat 08:00–18:00, or any time for call-outs.
Customer reviews
What customers are saying
Real reviews from WeFix customers.
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First time using a mobile service. It was surprisingly a lot easier and more convenient than I thought it would be.
Callum -
Fantastic service, Communication, quick and efficient. I would recommend to anyone looking for mobile mechanic. Nick
Nickon -
Absolutely superb. Will use again without a doubt.
Andy -
Had a service done, was charged what was quoted. very convenient. will definitely recommend.
Amber
FAQ
Battery questions
How do I know if my car battery needs replacing?
Typical signs are the engine turning over slowly when you start the car, dim lights, or stop-start no longer working. A battery warning light often means the battery isn’t being charged properly, which can point to the alternator rather than the battery, so we also offer alternator and charging system testing.
My car won’t start. Could it be the battery?
Often, yes: a flat or failing battery is a common reason a car won’t start, though a faulty alternator can cause similar symptoms. Send us your reg and what the car is doing on WhatsApp, or call 07300 558244, and we’ll tell you what we can do.
Does my new battery need coding?
Many modern cars, especially stop-start models with AGM or EFB batteries, need a new battery registered (coded) to the car after it’s fitted. We offer battery coding after fitment — send us your reg on WhatsApp if you’re not sure whether your car needs it.
Do you supply the battery?
Yes. We supply batteries from reputable brands, including AGM and EFB batteries for stop-start cars and standard batteries, with free at-home fitting. Send us your reg on WhatsApp and we’ll confirm the right battery and your price.
How quickly can you book me in?
Same-day appointments are often available, depending on your postcode and the job. We also take call-outs 24/7.
What warranty comes with a new battery?
Your new battery carries the battery maker’s warranty of up to 6 years, and our fitting work is covered by our 24-month / 26,000-mile workmanship warranty.
Where we’re based
Battery replacement near you
Each shaded circle shows roughly how far we travel from one of our five bases. If you’re just outside a circle, message us and we’ll let you know.
We cover around 30 miles from each base
Batteries
Need a new battery?
Enter your reg to start, or message us on WhatsApp with your reg, postcode and the battery you need.
- Free at-home fitting
- Batteries from reputable brands
- Transparent, upfront pricing