🔋 12V Auxiliary Battery Diagnosis & Replacement – UK Wide
If your EV or hybrid is suddenly dead, won’t start, or showing system errors, your 12V auxiliary battery may have failed. Even with a healthy main high-voltage pack, a weak 12V battery can shut down vital systems like computers, contactors, and charging relays.
At FixAnyCarsGroup.uk, we specialise in diagnosing and replacing failing 12V batteries in electric and hybrid vehicles across the UK. This issue is more common than you think – especially on low-mileage or infrequently driven EVs.
🔍 Common Signs of 12V Battery Failure:
- 🚫 Vehicle won’t power on despite charge
- ⚠️ Warning lights or infotainment flicker
- 🔌 Charging won’t initiate – AC/DC cable fails to respond
- 🔁 System restarts or resets
- 🧊 More common after cold weather or long storage
🧰 What We Check & Fix:
- 📉 Battery voltage, load and charge retention test
- ⚡ Check if DC-DC converter is maintaining charge
- 🔋 Replace 12V battery with OEM or upgraded unit
- 🧠 Scan ECUs for 12V-related errors or lockouts
✅ Mobile Service Covers:
London, Manchester, Birmingham, Brighton, Bristol, Leeds, Liverpool, and more.
📞 Call Now: 07421 186 356
FixAnyCarsGroup.uk – the UK’s trusted EV & hybrid mobile specialists. We come to you, fully equipped.
💡 Why This Matters:
The 12V battery powers critical electronics in your EV – including the BMS, safety relays, keyless entry, and even charging initiation. If it’s weak or dead, you can be left stranded despite a full main battery. Let us test and replace it before that happens.
Call 07421 186 356 or visit FixAnyCarsGroup.uk to book your mobile 12V battery service today.