How Do I Know My Car Battery Is Dead. You are running late for work and to make matters worse your car wont start. If your battery is good and your alternator isnt working the battery will still lose its charge because the alternator isnt keeping it charged.
If your car starts sometimes and is inexplicably dead sometimes you may have battery terminals that are broken loose calcified or corroded. Connect the black negative cable to the post of the WORKING battery. A typical 12-volt car battery is composed of six cells that chemically produce voltage and amperage to start your car.
Learn how to spot the signs that your car bat.
It should be considered dead and useless. How to Tell if a Car Battery is Dead. A typical 12-volt car battery is composed of six cells that chemically produce voltage and amperage to start your car. The battery has dead cell or cell if it cannot charge higher than 105.
