Updated at: 13-08-2022 - By: Lucas

Car trouble is the last thing any driver anticipates. Car batteries can die at any time, even when you’re simply out to run some errands or on a lengthy road trip. If you see that your car’s battery is running low, you should jump-start it as soon as possible.

Driving an automobile, how much time does it take to recharge the vehicle’s battery?

If you’re wondering what type of car battery charger is best for you, we’ve got the answer right here.

How Long Does It Take To Charge a Car Battery?

How Long Does It Take To Charge A Car Battery While Driving

The time it takes for a car battery to charge depends on a variety of factors, including:

  • The power left in your car battery – If your car battery is completely flat, it will take longer to charge than a battery that is only partially discharged. 
  • The amperage of the battery charger – A higher amperage battery charger will charge your car battery quicker than a charger with lower amperage. However, high amp car battery chargers are not the best choice for the long-term health of your car battery.
  • The size of the car battery – Large car batteries with high amps will take longer to charge than smaller car batteries. 
  • Is the car moving or idle – Driving a car is the easiest, quickest, and safest way to charge the battery. However, the wheels do not need to be turning for the battery to receive power. The car battery will charge if the car is idle but the alternator may not provide enough voltage to fully charge the battery. 

What Type Of Car Battery Charger Do I Need?

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Car battery chargers should have a minimum of 10 percent of your battery’s Ah (Amp hour) rating in amps when selecting one. Using the 100Ah automobile battery rating as an example, a 10 amp battery charger is required. Higher amperage chargers can charge your battery faster, but they may put the long-term health of your car’s battery at jeopardy.

You can see the time it takes to charge a car battery by looking at this list of chargers:

A 40 amp battery charger for your car’s battery. Charges a vehicle’s battery quickly and efficiently. Using a 40 amp battery charger, you can get your automobile back on the road in just a few minutes.

Car battery charger, 10 amps It can take several hours to recharge a car battery using this battery charger. Large, medium, and small automotive batteries may all be charged with a 10 amp battery charger in 8 14 hours, 6 8 hours, and 4 6 hours, respectively.

Car battery chargers rated at 4 and 2 amps For larger batteries, these chargers are better, but they take a long time to charge. A 48-amp battery will take 12 hours to charge using a 4 amp charger, and a 24 hour charge using a 2 amp charger.

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Car battery chargers come in three varieties.

Trickle chargers, linear chargers, and multi-stage chargers are all examples of these types of chargers. Having a car battery charger on hand in case of an emergency or to preserve the health of a battery in a vehicle you rarely use is an excellent option. However, driving your automobile is the safest and most effective way to recharge your battery.

How Long Does It Take To Charge a Car Battery While Driving?

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It is the alternator’s job to both charge and sustain the battery’s power. The alternator generates more electricity when you are driving. While driving, a car battery will typically take thirty minutes to an hour to fully recharge.

As the RPM (revolutions per minute) of the car’s engine increases, so does the time it takes to charge. Your engine will need to rev higher by at least 1000 revolutions per minute to replenish the battery. The more RPM you put off, the faster you go.

You can speed up the charging of your automobile battery by traveling at speeds more than 55 mph for about an hour at a time. The engine’s RPM can be increased to a high enough level to fully recharge the battery when on the freeway or a long open road.

However, charging your automobile battery while driving through cities and towns would take longer. Avoid congested routes if you want to recharge your vehicle rapidly while traveling.

How Do I Charge My Car Battery In an Emergency?

Driving is the safest and most convenient way to recharge your car’s battery. When used incorrectly or excessively, several external chargers might harm a vehicle’s battery. linear battery chargers, for example, can explode if left running for an extended period of time. Car battery chargers, on the other hand, can be quite helpful if you find yourself stranded and need to recharge your vehicle’s battery rapidly.

It’s possible that some motorists will opt to jump start their vehicles in an emergency. With a jump start, you’ll be back on the road in no time. Cars can only be driven for 10 to 15 minutes after a jump start, so it’s not a long-term solution.

When you use jumper cables, you may get your automobile back on the road immediately. When your car battery dies, a quick and easy solution isn’t always the best option. Jump starting your automobile puts a lot of strain on the alternator, which can lead to significant repair or replacement costs in the long run. Car batteries can be severely damaged if you frequently use jump wires to charge them.

Pull aside, turn on the hazard lights, and get yourself and your passengers to a safe location if you can’t recharge your car battery. Get roadside help; they’ll know how to recharge a dead car battery because they’re trained and equipped for the job.


Does revving engine charge the battery faster?

Your automobile battery will be charged faster if you rev your engine. When you rev the engine, the alternator works harder, supplying more current to the battery. However, revving the engine will only speed up the charging of the automobile battery if the battery is severely drained and is using up all of its available energy quickly..

How often should I start my car to keep the battery charged?

Keep your battery charged by starting your vehicle once a week at the very least. Idling the engine can help keep the battery charged, but it’s not always enough. Driving your automobile is the greatest method to keep its battery charged. Taking a little spin around the block in your car is a great method to recharge the battery, and you should do this at least once a week.

How long does it take to charge a car battery after a jump?

It’s possible that you’ll need to jump-start your car at some point. If your car battery dies, a jump start isn’t a long-term solution, but it can get you back on the road quickly. Car batteries require about 30 minutes to recharge after a jump start. After you jump start your car, you’ll need to remain driving for about 30 minutes to ensure the battery is fully charged.

Does your car need to be moving to charge the battery?

The battery can be charged even if your automobile is parked. It is the alternator rotating that charges the battery when the engine is running but the automobile is not moving. However, the alternator only supplies a little amount of electricity to the battery when the vehicle is at a standstill. When the automobile is moving, it spins faster and delivers more voltage to the battery.

How to keep the car battery charged when not in use?

If you can’t drive your car often enough to keep the battery charged, there are a few things you can do to avoid it from dying. Disconnect any battery-consuming devices from your car and see if you can save any money. For instance, there are dashcams and satellite navigation gadgets. Don’t turn your automobile on for a few seconds, then turn it off immediately.

Leaving the engine running for a long period of time can cause more harm than good to your automobile battery. The use of a trickle charger or battery condition can also aid to preserve your car battery’s charge when the car is not in use..


The maintenance of a car battery is quick and easy. When compared to tire changes and topping up the petrol tank, automotive batteries are extremely low-upkeep. All you have to do to maintain your car battery charged and running properly is drive it on a regular basis at speeds greater than 55 mph.

Faster charging of a car battery is possible with the use of external car battery chargers. However, if you regularly start your engine and drive your car, you don’t need a car battery charger. When you’re in a bind and need to get to a mechanic right away, a jump start may be your only option.

We hope this post has answered your question about how long it takes to charge a car battery while driving.