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 How Long Does It Take To Charge A Car Battery- Know Your Car Battery

How Long Does It Take To Charge A Car Battery- Know Your Car Battery

Car owners dread the moment when they are in a rush, and their car just won’t start because of a dead battery. It could happen because you left your lights opened or missed the signs of a weak battery. The battery may also die because of not using the car for a long time or not maintaining it properly. Whatever the reason is, luckily, you can recharge it. So if you’re thinking about how long does it take to charge a car battery or how it should be done, worry not because we will be discussing it all in this guide.

But before we head to how long does it take to charge a car battery, let’s look at some of the different types of car batteries. Knowing the different types of car batteries will also help you with how to charge a car battery.

Car Battery Types

Car Battery Types

Before knowing how long does it take to charge a car battery, you must know the different types of car batteries so let’s first discuss the several car battery types made for different vehicles.

To find out which one is suitable or used for your car, take a look below.

Wet Batteries

Also known as flooded batteries is one of the low-cost car battery types that are very commonly used. These batteries don’t require much maintenance and are spill-proof. They have freely suspended insulated plates with the negatively charged plate kept separate. Their spill-proof feature reduces the need to refill them regularly.


These batteries are another low-cost option that has calcium alloys plates. The utilization of calcium minimizes fluid loss and a slower discharge rate. Overcharging can damage these batteries.


It is one of the most popular and costly batteries used in expensive cars. They are most popular in electric and hybrid vehicles due to their eco-friendly nature. Compared to other battery types, Li-ion batteries store more charge and weigh less.


These are lead-acid batteries that have two variants: GEL and AGM. The GEL variant has silicone that keeps the acid within, in the form of a gel. Whereas AGM includes glass Matts to lower resistance.

Deep Cycle

These durable batteries are normally used in electric vehicles, golf carts, and small boats. Their thick plates offer more charge capacity. They are not suitable for road cars due to their high discharge rate.

Now that you are aware of the different battery types, you should know the type of charger as it will determine how long does it take to charge a car battery.

What Type Of Charger Do You Need?

What Type Of Charger Do You Need

Three types of chargers can charge your car battery. Let’s take a look at each of them and how long does it take to charge a car battery with them.

Linear Battery Charger

One of the simplest ways to charge your car battery is to plug it into a wall socket. But this charger works at low amperage and might take a longer time to charge your dead battery. If you’re wondering how long does it take to charge a car battery with a linear battery charger, well, it’s going to take up to 12 hours.

One of the risks of using linear chargers is that they run on continuous charge and will continue to charge the battery even when it reaches full power. This can damage your battery.

Multi-Stage Charger

Instead of continuous charge, the multi-stage charger provides bursts of power. This prevents long-term battery damage and is better than linear charging. Their charging speed is also very fast. If you’re wondering how long does it take to charge a car battery with a multi-stage charger, the answer is only a few hours.

Trickle Charger

These chargers operate between the range of 0.4 to 8 Amperes. They have a low power output level and are not the right choice to charge a dead battery. However, they are useful to prevent your car battery from dying. You can connect them to the battery when the car isn’t in use.

How Long Does It Take To Charge A Car Battery?

How Long Does It Take To Charge A Car Battery

Generally, how long does it take to charge a car battery? There are a lot of factors to give a definite answer to it.

The time needed to fully charge your car battery depends upon the voltage, amperage, car battery type, and type of charger that you use. Also, the longer you leave the battery uncharged, the longer it will take to recharge. Moreover, a high amp charger will take less time than a low amp charger. However, using a high amp charger has its risks, including reduced battery life. With a charge amp of 4 to 8 amperes, a regular car battery will take around 4 to 24 hours to fully charge.

How Do I Determine The Charge Duration?

A simple formula can help you determine how long does it take to charge your car battery.

Just multiply the reserve capacity of your battery by 0.6. This tells you how long your car needs to be charged to reach full capacity. Let’s say your car has 200 minutes in the reserve capacity, so your charge duration will be 200 times 0.6, which is 120 amp-hours.

To find out how long does it take to charge a car battery, divide the no. of amps by amp hours. Take a look at these amperages and how long does it take to charge a car battery with them:

  • 50 amps -2.4 hours
  • 40 amps – 3 hours
  • 12 amps – 10 hours
  • 10 amps – 12 hours
  • 4 amps – 30 hours
  • 2 amps – 60 hours

In terms of how long does it take to charge a car battery, 50 and 40 amps are useful for traveling as they are quick and efficient. However, regularly using high-amp chargers can reduce your battery life. Whereas chargers with low amp such as 4 and 2 are useful for vehicles that are seldom used. They take a long time to charge the battery but do not affect its battery life negatively. If you want to charge at a reasonable speed without damaging the battery, the 8-12amp range is a good choice.

However, if your battery has been dead, the charge time will be affected by its condition, the performance of the alternator, and the charger used. If it has a capacity of 12 to 12.4 volts, you can recharge it using the car’s alternator.

A half-hour drive- with all electrical items turned off will be sufficient to charge the battery enough.

To charge a car battery, the best method is to let it be idle with all the electrical items turned off. So make sure when you are charging your car’s battery, the radio, AC, lights, wipers, and other electrics are turned off.

How To Charge A Dead Car Battery

Now that you know the answer to how long does it take to charge a car battery when charging with different charger types, let’s look at how to charge a dead car battery.

When a car battery has a voltage lower than 12 volts, it is considered dead. If you’re wondering how to charge a dead car battery or if it’s even possible, then the answer is here.

Though, if your car is in a pretty good working condition, you can easily charge its dead battery. However, keep in mind that using the alternator to charge a completely dead battery can damage the alternator and the battery.

Here’s how to charge a car battery that is dead:

  1. A charger or jump-start method can be used for this purpose. Once that is done, let the engine idle with all the electrical items turned off.
  2. Another method is to jump-start the car and immediately connect it to a dedicated charger. This is a safe way of recharging the dead battery without damaging the alternator.

What Is The Car Battery Replacement Cost?

What Is The Car Battery Replacement Cost

If you feel like you need professional help in replacing your old battery, you can take it to any mechanic and ask for a battery replacement. Depending on the battery you buy, the car battery replacement cost may differ.

Make sure to consider all these factors when deciding if the car battery replacement cost is worth it or not.

  1. How fresh the battery is
  2. Power needs
  3. Size and fitting
  4. Warranty
  5. Battery care and maintenance

Usually, car battery replacement costs fall in the range of $50 to $300. However, the factors mentioned above, and the brand of the battery also play a role.

Top 10 Car Battery Brands

Top 10 Car Battery Brands

Since car batteries don’t last long, eventually, you will have to replace yours too. There could be many reasons that degrade your battery’s performance. But when it stops working smoothly even after recharging, it is a sign to replace it.

However, there are many car battery options in both conventional lead-acid or advanced AGM designs.

Listed below are the top 10 car battery brands that can be a good replacement for your vehicle’s battery.

Optima Batteries

One of the best car battery brands, optima released lead-acid batteries and AGM batteries for commercial use. Their spiral cell technology and computerized battery chargers made the brand more famous. They have pure lead batteries that conduct electricity better and improve performance. These batteries also recharge quickly and have a high capacity to store charge.


One of the most recognizable names in the industry, Duracell offers quality and reliability that many people believe in. They have a special 4 chamber leak protection feature that prevents spills or leakages due to road vibrations. Their flam arrestor feature also offers defense against external ignition. In addition, they have options for all sorts of vehicles.


This brand is owned by EnerSys Energy Products Inc. They manufacture batteries in over 17 countries and have more than 100 years of expertise. They have mid-range as well as expensive batteries for cars of all sizes. They are more famous for recreational vehicles (RV). Their lead-acid enhances the charging and discharging rate.


Founded by General Motors, ACDelco supplies high-quality batteries, spark plugs, and much more for vehicles all around the world. There is no need to refill the batteries with water. Their spillproof and well-designed batteries have valve-regulated technology. Their design keeps the battery safe from corrosion and seepage. The calcium lead alloys improve performance and minimize water consumption.


Bosch has introduced really good quality batteries for electric vehicles. They focus mainly on solid-state cells in lithium-ion batteries. Their goal is to develop a battery of 190kg that can store 50kWh of energy.

XS Power

XS Power has spillproof and well-designed batteries. Their batteries are resistant to road vibrations and have a large charging capacity. Their AGM batteries are famous for their power-packed performance. Their convenient design allows them to be used in trucks, vehicles, and even SUVs.

Mighty Max

Mighty max has some high-quality deep-cycle AG batteries sealed with lead-acid. The spill-proof design lets the battery be used at higher temperatures as well. Their batteries are designed to withstand shocks and vibrations.


DieHard is one of the most trusted American battery brands. Their cost-effective batteries are designed to fulfill the power demands of new vehicles. They have been serving for over 50 years and are available worldwide. Their batteries are designed to prevent damage from road vibrations and offer more durability, even in sub-zero temperatures.


VMax has AGM batteries that are made with heavy-duty tin and lead. This improves their service life and offers good performance even after overcharging. They have many options suitable for all vehicles and climatic conditions.


AGM batteries from SoundQuest have removable brass posts and a very good power reserve capacity. They are suitable for electric vehicles and accessories. The durable and efficient batteries remove the need to add capacitors to the system. It is also a good choice for a secondary battery.

How To Take Care Of Your Car Battery

How To Take Care Of Your Car Battery

Now that you have read about battery types, chargers, and how long does it take to charge a car battery, you might want to learn about different ways to keep the battery safe.

Read the tips below to maintain your car battery:

  1. Change battery every four years
  2. Be careful when adding water
  3. Check battery acid level after every six months
  4. Get it checked by a mechanic
  5. Keep the battery clean
  6. Make sure the cables are tight and properly secured
  7. Charge the battery if the car has not been used for a long time
  8. Keep it warm, especially during winters
  9. Do not overcharge the battery
  10. Avoid regular use of high-amp chargers


Car batteries don’t last forever, but proper care and maintenance can go a long way. Now that you know how to charge a car battery and how long does it take to charge a car battery, you can keep your battery safe.

With the right knowledge and correct recharge method, you can charge your car’s battery. And if you have to find a replacement for your car battery, you can choose one of the top 10 car battery brands at a reasonable car battery replacement cost, as we discussed.

Lastly, always make sure to turn off everything before leaving the car and regularly follow battery care tips.

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