Slow, laboured starting on a cold morning is the classic sign. Dim headlights at idle, electrics behaving oddly, or a battery light on the dashboard all point the same way.
Most batteries last three to five years. Lots of short journeys shorten that, because the alternator never gets long enough to put the charge back.
We test batteries free of charge and fit replacements while you wait — details on our battery replacement page.
If the battery is fine, we will check the alternator and starter before selling you anything.