How Long Does It Take to Recharge a Car Battery?

Car batteries can die for various reasons, including leaving the lights on or not driving for extended periods. If you find yourself in this situation, you may wonder how long it takes to recharge a car battery. The answer depends on various factors, such as the type of battery, its age, and the charging method used.

Factors That Affect Battery Recharge Time

The time it takes to recharge a car battery depends on various factors, including:

Battery Type

Lead-acid batteries, which are commonly used in cars, take longer to recharge than lithium-ion batteries. Lead-acid batteries can take between 4 to 24 hours to recharge, while lithium-ion batteries can recharge within an hour or two.

Battery Age

The older the battery, the longer it takes to recharge. If the battery is more than five years old, it may take longer to recharge than a new battery.

Charging Method

The charging method used also affects the recharge time. There are three primary charging methods:

  • Trickle charging: This method charges the battery slowly over an extended period. It is the safest method but also the slowest, taking up to 48 hours to recharge the battery fully.
  • Fast charging: This method charges the battery quickly but can also damage the battery if not done correctly. It can take between 2 to 6 hours to recharge the battery fully.
  • Jump-starting: This method uses another car’s battery to jump-start the dead battery. It is the quickest method, taking only a few minutes to get the car running. However, it does not recharge the battery fully and may cause damage if done repeatedly.

How to Recharge a Car Battery

Before attempting to recharge a car battery, it is essential to follow these safety precautions:

  • Wear protective gear, such as gloves and goggles, to protect yourself from battery acid.
  • Ensure the vehicle is turned off and the keys are removed from the ignition.
  • Disconnect the battery cables and remove the battery from the vehicle.
  • Place the battery on a flat surface and away from flammable materials.

Once you have taken the necessary safety precautions, you can recharge the battery by following these steps:

  • Choose the appropriate charging method based on the battery type and age.
  • Connect the charger’s cables to the battery terminals, ensuring the positive cable is connected to the positive terminal and the negative cable to the negative terminal.
  • Set the charging time and wait for the battery to recharge fully.
  • Disconnect the charger’s cables from the battery terminals and reconnect the battery to the vehicle.
  • Start the engine and let it run for a few minutes to ensure the battery is fully charged.


Recharging a car battery can take anywhere from a few minutes to 48 hours, depending on various factors such as battery type, age, and charging method used. It is essential to follow safety precautions when recharging a battery and choose the appropriate charging method based on the battery’s specifications. By doing so, you can ensure your battery is fully charged and ready to use when you need it.