Car battery replacement

A car that won't start after lights were left on may only need a charge or jump start. Slow cranking, repeated flat mornings or a battery that won't hold charge can point to a failing battery, but the charging system and other electrics can cause similar symptoms.

If you are unsure, ask for testing in the request. Replacing a healthy battery will not fix an alternator fault.

Batteries are not all interchangeable. Capacity, physical size, terminal layout and cold-cranking performance need to match the vehicle. Start-stop cars usually need a suitable AGM or EFB type, not a basic flooded battery.

Some vehicles also need the new battery registering or coding on the car so charging and stop-start behave correctly. Ask whether that is included if your car requires it.

Many battery jobs can be done at home or work when a mobile mechanic covers your postcode, can park safely and the battery is accessible. Awkward locations or coding tools can mean a workshop visit instead.

Say where you want the work done. See mobile mechanic for how mobile visits work in general.

Look for testing, supply of the correct battery, fitting, any required coding, call-out or travel charges, VAT where charged, and disposal of the old battery. A low figure may leave one of those out.

Same-day fitting depends on stock and the provider's diary. Mark the request as urgent if you need help today; it is not guaranteed.

Fix My Vehicle UK doesn't sell or fit batteries. Independent garages and mobile mechanics reply to your request. A quote is not a booking until you arrange the appointment with them.

Extra work found after testing should be agreed before it starts. For unclear electrical faults, car diagnostics may be the better first step.