I wanted an EV battery health check; left a request on the website, Ray rang me back within 90 minutes and came over later than morning and quickly and competently completed the check.
Chris Salmon Mobile Car Battery Replacement Service
Need a New Car Battery? I'll Supply & Fit It at Your Location.
I source and fit the right battery at your home or workplace. Call before 14:00. Same-day battery fitting is subject to availability and suitable battery stock. Next-day fitting is not guaranteed. You speak directly to me.
- Mon–Sun 08:00–20:00 only; bank holidays unchanged; no out-of-hours attendance
- No Membership Required
- Direct Technician Contact
from £45
Call for current availability and an estimated arrival time.
Vehicles Covered
Trusted by motorists in Watford, Harrow, Hemel Hempstead and St Albans.
Here's what customers say about our Mobile Car Battery Assistance service, in their own words.
Chris Salmon My battery failed this morning. Ray was at the scene within the hour. Explained the situation, got the car running again, advised on some longer term solutions and was super friendly. Would highly recommend!
Ash I can proof with my experience, Ray (the owner for this services) is a person who this days you can't find easily. He a professional and very polite person. Strongly recommend his services with anyone.
Alex Haxer Ray is great. Very efficient, friendly, fast and reliable. It is exactly as it says on the website: no nonsense, just an excellent service. A life saver.
Sander Berg Feedback *feedback shown has been collected via this website, Google and Facebook
Dual Action Roadside is run by Ray, a fully insured independent roadside assistance service based in Watford, Hertfordshire. I've worked in the roadside recovery industry for over 10 years and I provide mobile car battery replacement across a 10-mile standard radius from WD19 6YB, covering Harrow, St Albans, and Hemel Hempstead. When you call 07594 218651, you speak directly to me. Mobile-only service: we come to your vehicle; customers do not visit our operating base at WD19 6YB. Our standard service area is a 10-mile radius from WD19 6YB. Please provide your postcode to confirm coverage; town and postcode listings do not mean every address is within the standard radius. Beyond this radius, an additional travel charge is quoted and agreed before booking.
What's Included With Every Mobile Car Battery Assistance
A failing or dead car battery doesn't have to mean a trip to the garage. I come to you at home, at work, or wherever your car is parked source the correct replacement battery locally, and fit it on the spot. Not all car batteries are the same.
Modern vehicles particularly those with stop-start systems, high-spec audio, or advanced driver assistance technology require AGM or EFB batteries rather than a standard lead-acid unit.
Fitting the wrong type can cause problems with the vehicle's energy management system. I carry the knowledge to get this right and source the correct battery for your specific vehicle before I attend.
When you call, I'll confirm your vehicle details and give you a battery price before I commit to coming out the £45 fitting charge plus the cost of the battery itself, confirmed upfront with no surprises when I arrive.
The fitting process includes removing the old battery, cleaning the terminals, fitting the replacement, and running a post-fit check to confirm the charging system is working correctly.
On some vehicles particularly BMWs, Mercedes, Audis, and other European makes the replacement battery needs to be registered to the vehicle's ECU.
I carry the diagnostic equipment to carry out this registration where required. Available Monday to Sunday, 08:00–20:00. Call before 14:00. Same-day battery fitting is subject to availability and suitable battery stock. Next-day fitting is not guaranteed.
- Battery type assessment standard lead-acid, AGM, or EFB matched to your vehicle spec
- Supply and fit of a quality replacement battery
- Old battery safely removed and disposed of responsibly
- Battery terminal check and clean before fitting
- Post-fit voltage and charging system check
- Honest advice on whether your alternator is charging correctly
Simple Process
How it Works
Three steps from your call to me being with you.
Call
Call me directly I'll confirm your vehicle make, model, and year, check which battery type you need, and give you the battery price before I set off. No call centres, no holding.
Confirm
I confirm your location, give you an honest ETA, and agree the total cost labour plus battery before I leave. You know exactly what you're paying before I arrive.
Attend
I arrive with the correct battery for your vehicle, fit it on the spot, run a post-fit check, and take away the old battery for responsible disposal.
Transparent Pricing
Mobile Car Battery Assistance Pricing
Transparent pricing with no hidden fees. We confirm the cost before we start — always.
Standard Hours
08:00 – 20:00
from £45
plus battery cost, price confirmed before I start
- No call-out fee
- Price confirmed before we start
- No membership required
Bank TransferContactlessDebit CardCredit Card
Mon–Sun 08:00–20:00 only; bank holidays unchanged; no out-of-hours attendance
Before You Book — Things to Check
A few quick checks before you call can save you time and money. Run through these first.
Is it definitely the battery and not the alternator?
If your battery keeps going flat shortly after being jumped or charged, the alternator may not be charging it correctly. A new battery won't fix an alternator fault call me and I can test both before you commit to a replacement.
Do you know your battery type standard, AGM, or EFB?
It's usually printed on the battery label. AGM and EFB batteries are required on most stop-start vehicles. Fitting the wrong type can cause charging system faults. I'll confirm the correct type when you call just have your vehicle make, model, and year ready
Is your battery still under warranty?
Many batteries come with a 2–3 year warranty. If your battery is less than 3 years old and has failed, it may be worth checking whether it's still covered before paying for a replacement.
Is your vehicle a European make with battery registration?
BMW, Mercedes, Audi, Volkswagen, and some other European vehicles require the replacement battery to be registered to the ECU. Without this, the charging system won't calibrate correctly. I carry the diagnostic equipment to do this just mention it when you call.
Have you ordered before 14:00?
Call before 14:00. Same-day battery fitting is subject to availability and suitable battery stock. Next-day fitting is not guaranteed. Call to check fitting availability for your area.
Common Questions
Everything you need to know before you call.
How much does a mobile car battery replacement cost?
The call-out and fitting charge starts from £45. The battery cost is additional and depends on your vehicle and which battery type it requires, standard, AGM, or EFB. I'll confirm the full price labour plus battery before I set off. No hidden fees.
How quickly can you get to me?
Call for current availability and an estimated arrival time. Call before 14:00. Same-day battery fitting is subject to availability and suitable battery stock. Next-day fitting is not guaranteed.
What areas do you cover for mobile battery replacement?
I cover a 10-mile standard radius from WD19 6YB, including Harrow, St Albans, Hemel Hempstead, Bushey, Rickmansworth, Kings Langley, Abbots Langley, Borehamwood, Radlett, Ruislip, Pinner, Northwood, Stanmore, and Edgware. Our standard service area is a 10-mile radius from WD19 6YB. Please provide your postcode to confirm coverage; town and postcode listings do not mean every address is within the standard radius. Beyond this radius, an additional travel charge is quoted and agreed before booking.
Is mobile battery replacement available 24/7?
No battery replacement is available Monday to Sunday, 08:00–20:00 only. This is because I need to source the correct battery for your vehicle before attending. If you have a flat battery outside these hours, I offer a 24/7 mobile jump start service which can get you going until a replacement can be arranged.
Do I need a membership?
No. There's no membership, no subscription, and no joining fee. You pay for the callout and the battery nothing else.
Can you replace the battery on a stop-start vehicle?
Yes. Stop-start vehicles require AGM or EFB batteries I carry the knowledge and equipment to supply the correct type and register it to the vehicle's energy management system where required
What do you do with the old battery?
I take it away and dispose of it responsibly through proper recycling channels. You don't need to worry about getting rid of it yourself.
My car battery is less than a year old why has it failed?
Early battery failure can be caused by a faulty alternator not charging it correctly, excessive short journeys that don't allow a full charge, or occasionally a manufacturing defect. I can test your charging system when I attend to help identify the cause.
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Service Articles
Mobile Car Battery Assistance guides
Service articles related to Mobile Car Battery Assistance, including local availability, common callouts and what to expect before you call.
Roadside Breakdown Assistance Near You
I cover Watford, Harrow, Hemel Hempstead and St Albans, with jump-start help day or night. Other services have their own hours and booking requirements.
Dual Action Roadside provides mobile breakdown assistance across Watford, Bushey, Rickmansworth, Kings Langley, Abbots Langley, Borehamwood, Radlett, St Albans, Hemel Hempstead, Harrow, Ruislip, Pinner, Northwood, Stanmore and Edgware from our operating base at WD19 6YB, Hertfordshire. Standard coverage is a 10-mile radius; confirm your postcode. Beyond this radius, an additional travel charge is quoted and agreed before booking.
Mobile-only service — we come to your vehicle. Customers do not visit our operating base at WD19 6YB.
Our standard service area is a 10-mile radius from WD19 6YB. Please provide your postcode to confirm coverage; town and postcode listings do not mean every address is within the standard radius. Beyond this radius, an additional travel charge is quoted and agreed before booking. This applies to all four mobile services; EV Battery Health Checks remain by appointment.
Mobile Vehicle Services Borehamwood
Hertfordshire
- Borehamwood WD6
Mobile Vehicle Services St Albans
Hertfordshire
- St Albans City Centre AL1
- London Colney & Park Street AL2
- St Albans (West & North) AL3
- Colney Heath & Smallford AL4
Roadside Breakdown Assistance Harrow
Greater London
- Harrow HA1, HA2, HA3
- Ruislip HA4
- Pinner HA5
- Northwood HA6
- Stanmore HA7
- Edgware HA8
Roadside Breakdown Assistance Hemel Hempstead
Hertfordshire
- Hemel Hempstead HP1
- Hemel Hempstead (North & East) HP2
- Boxmoor, Bovingdon & Apsley HP3
Roadside Breakdown Assistance Watford
Hertfordshire
- Watford WD17, WD18, WD19, WD24, WD25
- Bushey WD23
- Rickmansworth WD3
- Kings Langley WD4
- Abbots Langley WD5
- Borehamwood WD6
- Radlett WD7