Introduction
The car battery supplies electrical power to start your engine and run all electronics. A weak battery can leave you stuck anywhere.
Functions of a Car Battery
- Starts the engine
- Powers lights, AC, radio
- Stabilizes voltage in the system
Signs of a Weak Battery
- Slow engine cranking
- Clicking sound when starting
- Dim headlights
- Battery warning light
- Electrical system issues
Battery Lifespan
Typically lasts 2–4 years depending on climate and usage.
Maintenance Tips
- Clean battery terminals
- Check water level for serviceable batteries
- Ensure alternator is charging properly
- Avoid leaving lights on
When to Replace
Replace when:
- Voltage drops below 12.4V
- Car struggles to start
- Battery is older than 3 years in hot climates