how do you know if your car battery is dead

March 7, 2023
how do you know if your car battery is dead

How to know if your car battery is Dead

Having issues with a dead battery can definitely put a damper on your day! Learning how to check a battery for any signs of death can help you determine when to replace it. Keep reading to find out how you can tell that your car battery is dead.

Symptoms of a Dead Car Battery

The most common symptoms of a dead battery are:

  • A clicking sound when you turn the key
  • Headlights or dash lights dim or don’t turn on
  • Engine cranks slowly or won’t turn over

Testing Your Battery

Testing your battery is a good way to make sure the battery is working properly. To do this, make sure the headlights, parking lights, and interior lights are off, then use a voltmeter to measure your battery’s voltage. If the voltage reads 12.6 or higher, the battery is in good condition. If it’s lower than 12.6 volts, it’s a sign that your battery is on its way out and needs to be replaced soon.

Alternator Issues

Having a dead battery can be a sign of alternator issues. The alternator is responsible for recharging the battery so if it’s not working properly, it can quickly cause your battery to die. To check if your alternator is the issue, use a clamp-on amp meter to measure the current output from the alternator. if it’s below 14.5 amps the alternator probably needs to be replaced.


By looking out for the signs and symptoms, you can determine whether or not you need to replace your car battery. You can also use a voltmeter or amp meter to do a more accurate check. Taking the time to do a battery check and insure that your battery is working properly can save you time, money, and stress later on.

What are the signs of a dead car battery?

1. The engine fails to start.

2. Dim or flickering headlights.

3. No interior lights or dashboard lights.

4. Clicking sound when trying to start the car.

5. Weak or no electrical accessories (power windows, radio, etc.)

6. Swelling, bloating, or leaked battery acid.

7. Loud grinding sound when attempting to start the vehicle.

8. Slow engine crank when starting the car.

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