How to Test and Replace a Bad Car Battery (COMPLETE Ultimate Guide)
A video on YouTube. In Cars, a Krater category.
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This video covers how to diagnose, test, and replace a bad car battery, showing how to test for parasitic draw and alternator output without resetting vehicle electronics.
From the video
Answers: How do I diagnose and replace a bad car battery and test my alternator?
- battery replacement
- battery diagnosis
- alternator testing
- parasitic draw testing
- battery cleaning
What it concludes
- Battery voltage of about 10.5v indicates a bad cell in the battery.
- Vibration and heat are the main enemies of a car battery, causing grid damage and acid separation.
- Charging voltage should be between 13.6v and 14.6v; voltage above 14.6v can damage the battery.
- Parasitic draw should be 50 milliamps or less; higher draws will drain the battery.
- Connecting a trickle charger helps keep the battery fully charged and extends its lifespan.
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