How Long does it Take to Charge a DEAD Car Battery

A car battery plays a crucial role. It provides the electrical power necessary to switch on the engine of a car. It also stores the extra electricity, created by the alternator. With a DEAD car battery, you will not be able to operate several electrical accessories of the car. But the point is why does it happen? There are numerous reasons behind a car battery failure.

Causes of a Car Battery Failure

 DEAD car battery cahrging
Duration to charge a DEAD car battery (photo source:

With a dead car battery, you will find yourself stranded and of course, without any solution to start your car. In this situation, the best thing to do is call a mechanic. But one must know the common reasons for a car failure.

1. Leaving the Car’s Headlights On

Although, most cars have automatic light shutoffs, yet without this facility, leaving headlights on is the top reason for a DEAD car battery. Headlights easily consume the battery and result in the need for a jump start.

2. Using Accessories of the Car

If you are using various accessories of the car leaving the key in the on position, the battery of your vehicle will die rather quickly. Since the battery needs to provide electricity to start the engine, using accessories such as radio and other infotainment systems cause battery loss.

3. Poor Charging

Signs for a DEAD Car Battery
DEAD Car Battery is due to poor charging (photo source:

If the charging system isn’t doing its job well, the car’s battery will drain even while in use. Some cars provide power to the lights, radio, and other systems from the car’s alternator. This depletes the battery faster in case there is a charging problem.

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How Much Time does it Take to Charge a DEAD Car Battery

An array of factors is responsible for determining the time duration to charge a car battery.

  • The condition of the battery
  • Availability of remaining charge after being previously used
  • The power of the charge
  • The setting on the charge for charging the battery

It means that a high capacity charger would merely take 4-5 minutes to fill the battery. On the other hand, if the charging is tickling it may take around 24 hours to charge a dead battery completely.

Another important point not to miss is the capacity of the battery you are charging. For example, a 12 volts battery will take more time than a 24 volts battery. Along with this, the condition of the battery also plays a key role. It directly affects the time required to charge it. A maintained battery having sulphuric acid and distilled water will certainly take less time. Further, if the charge used for the battery is more, it takes lesser to charge it. For instance, a 2amp charge may take 24 hours to charge a battery of 24 volts while a 3amp charge will take less than a day to charge a 12 volts battery.

A DEAD car battery can cause troubles to the owner anytime, anywhere. Keep an eye on your battery’s condition and charge it regularly. Remember the main causes and some maintenance tips to avoid a battery failure and an embarrassing situation.