How Long Does It Take to Charge a Car Battery?

Each car battery takes a different time to become fully charged, depending on the charger being used and the size of the battery. Before connecting the car battery to the power supply source, it is essential to calculate the car battery’s time to charge fully.

Time taken for the car battery to be fully charged vary depending on the amperage of the battery. For example, a car battery with a 40-ampere charger takes a longer time, approximately 35 to 60 minutes, unlike a car battery with a 2-ampere charger which can take up to 48 hours to completely charge. The article shows how long a car battery can take to charge a car battery.

How Long Does It Take to Charge a Car Battery?how long does it take to charge a car battery

Different chargers take different times to charge the car batteries until complete. The faster the battery charger, the lesser the time needed for the car battery to charge until complete. When you charge the battery with a low ampere charger, the charge lasts longer when compared to using a fast charger. Therefore, it is advisable to use a less ampere charger to charge the battery and maintain it at full charge while avoiding damaging it rather than using a charger to drain the battery faster.

To know how much time needed to charge a car battery, understand the information below.

1. Time taken to charge a battery using a high ampere charger completelyTime taken to charge a battery using a high ampere charger completely

The high ampere charger is approximately 40 amperes. Most people prefer using a 40-ampere charger to charge their batteries because they are quick and effective during their charging process. The chargers are suitable when one is in a hurry as the car starts within a short time after the battery is connected to the power supply source via a 40-ampere charger.

Also, the charger is suitable in places where the battery is completely drained and requires an immediate jump-start using portable jump starters such as the Noco GB40 jump starter.  A 40-ampere charger can take approximately 25 minutes to 60 minutes to charge the car battery.

In addition to that, take precautions when charging the car battery, such as; avoid connecting the charger to the battery for long hours as the charger can damage the battery by reducing the amount of time the battery can hold a charge. Instead of leaving the charger connected to the battery all the time, consider using a smart charger that has unique features of turning off power transmission once the car battery is full.

2. Time taken to charge a car battery using a 4-ampere chargerTime taken to charge a car battery using a 4-ampere charger

Batteries such as a deep cycle battery have the feature of holding the car battery charger for a longer time than a 40-ampere charger. For instance, the car battery may hold a charge for up to approximately 48 hours. If you charge the car battery using a 4-ampere charger, the maximum time taken to charge the battery entirely is 12 to 48 hours. Therefore, if one needs to charge the car battery faster, it is not advisable to use a 4-ampere charger but instead, use a 40-ampere charger.

A 4-ampere charger is more efficient and can keep the car battery last longer without draining power faster. Such chargers automatically shut off when the battery is full and switches on when the battery drains energy quicker. Small devices commonly use it with small batteries such as trickle chargers that are not primarily used.

3. Time taken to charge a car battery with 2-amperesTime taken to charge a car battery with 2-amperes

A 2-ampere charger takes the longest time when compared to other ampere chargers. A car battery charger with a 2-ampere charger lasts longer and drains less power than a car battery charger with a 40-ampere charger. Charging a car battery using a 2-ampere charger takes approximately 24 to 48 hours to charge the battery until complete.

Therefore, this type of charger has the advantage of maintaining the battery at full charge. Unlike a 40 ampere charger, the charger protects the battery from any issues such as car battery overcharging, the occurrence of electrical spikes, among others. However, this battery charger is not effective for those who want to charge the car battery faster.

For other ampere chargers such as a 10-ampere charger, the maximum time to charge the car battery is approximately 3 to 7 hours only. For a 20 ampere charger, the time taken to charge the car battery is almost 40 ampere, which is 2 to 4.5 hours.

4. Time taken to charge a dead car batteryTime taken to charge a dead car battery

A dead car battery means a battery that has drained all power and is not connected to the power supply source. A dead car battery takes a couple of hours to be fully charged, approximately 3 to 24 hours, depending on the charger and size of the car battery. The most preferred amperes for charging a dead battery is a 4-ampere charger.

Before charging or jump-starting a dead car battery, first, inspect the car battery present and compare it with the amperes of the charger and see if they perfectly suit each other. Also, consider using either a charger that can charge the car battery faster or a low ampere battery to maintain the battery for a more extended time without draining power quickly.

Also, check the model of the car battery. Car batteries with medium size use middle amperes ranging from 30-amperes to 80-amperes. Finally, avoid using high ampere chargers to charge a dead battery as they can damage the battery very quickly, especially when it remains unattended and disconnected.  Therefore, it is advisable to consider using a low ampere charger to charge a dead car battery.

5. Time taken to charge a car battery using a trickle chargerTime taken to charge a car battery using a trickle charger

Many people prefer using a trickle charge to charge their car batteries since they can be left connected for a more extended time without damaging the battery. Depending on the status of the car battery, a trickle charger uses amperes ranging from 2 to 3 and can charge the car battery for approximately 24 to 48 hours.

A trickle charger is essential in that it automatically switches off once the car battery is fully charged. Such characteristics protect the car battery from any damages that may arise due to battery overcharging or overheating. Therefore, it is advisable to use a trickle charger when not in a hurry to charge the car battery completely.

Frequently asked questions:

  • Which speed can I use to charge my car battery?

The speed recommended for charging your car battery depends on your preference. If you wish to charge your car battery slowly to keep the battery in good condition, consider using a charger with low amperages, such as a 2-ampere charger. But, if you wish to charge the battery faster, use a high ampere charger such as a 40-ampere charger while keeping in mind that a high amperage charger can easily damage your car battery.

If you want to charge the car battery faster without damaging it, consider using a smart high amperage charger rather than a regular battery charger. Finally, if the car battery is dead, use a low amperage charger such as a 2-ampere charger to jump-start the battery without damaging it with a high amperage charger.

Conclusion

If your car battery drains all power and requires immediate charging, first know the kind of battery present in your car and how many amperes it can withstand. Use the information above to choose the best ampere charger that suits your preference, such as charging the battery faster when in a hurry, unlike when not in a hurry.

Also, remember to turn off all car accessories when not in use as they drain the car battery faster and turn them on only when necessary. Finally, keep your batteries safe and keep on testing them, especially when not in use.

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