How Do You Know If You Have A Bad Battery. Common symptoms of a dead. Your car has lost electricity.

Another symptom of a bad or failing cable is the presence of corrosion on the terminals. For a battery all you need is a simple voltmeter with an analog gauge. Check your battery terminals for corrosion.
If not you should get it replaced.
With a running engine the battery voltage should go up to 135V-144V. If the voltmeter shows no reading or a reading below 124 volts the battery is dying. If your cars battery isnt holding a charge you have a problem with your alternator or battery. Damage to the battery or an internal short can cause the battery to leak gas.
