How to Test and Replace a Bad Car Battery (COMPLETE Ultimate Guide)

A video on YouTube. In Cars, a Krater category.

Summary by Krater

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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