A failing car battery rarely dies without warning. Understanding these signs can save you from being stranded and help you plan for a replacement before it's too late.

1. Slow Engine Cranking

When you turn the key and the engine cranks slowly or struggles to turn over, this is often the first sign of battery weakness. A healthy battery should provide strong, consistent power for starting.

2. Dashboard Warning Lights

Modern vehicles have sophisticated monitoring systems. If you see the battery warning light or check engine light, don't ignore it. These systems often detect electrical issues before they become critical.

3. Dim or Flickering Lights

Headlights that seem dimmer than usual or interior lights that flicker can indicate insufficient electrical power from a failing battery.

4. Electrical Issues

Problems with power windows, radio, or other electrical components can be early indicators of battery problems, especially if multiple systems are affected.

5. Battery Age

Most car batteries last 3-5 years. If your battery is approaching this age, it's wise to have it tested regularly.

6. Corrosion Around Terminals

White, blue, or green corrosion around battery terminals can interfere with proper connection and may indicate battery issues.

7. Strange Smells

A rotten egg smell near the battery could indicate a leak or overcharging issue that requires immediate attention.

8. Swollen Battery Case

Physical deformation of the battery case often indicates internal problems and potential failure.

9. Frequent Jump Starting

If you find yourself needing jump starts regularly, your battery is likely failing and needs replacement.

10. Electrical System Malfunctions

Intermittent electrical problems or complete system failures can indicate an unreliable power supply from a failing battery.

What to Do Next

If you notice any of these signs, contact London Auto Doctor for professional battery testing and replacement. Our mobile service means we come to you for convenient battery diagnosis and installation.