Does Revving the Engine Charge the Battery Faster?

Today this question has become very popular in the automotive field – does revving the engine charge the battery?. This article was written primarily to explain many of the factors that can affect how quickly a battery can be charged.

We will go from the point of when it is best to accelerate the engine to help charge the battery, if starting helps charge the battery, to the point of whether accelerating the engine damages the vehicle.

We will also explain how to safely accelerate your engine to charge the battery, what temperature the engine should be at, and review the benefits of accelerating the engine to charge the battery.

Does revving the engine charge the battery Faster?

Simply put, yes, revving the engine charges the battery much faster, but only when the battery is in a significant state of discharge. Engineers typically design car systems to ensure that the battery remains charged during extended use.

Generally, lead-acid batteries are used more frequently in cars, because they only require the amperage provided for the alternator while the car is idling.

At that point, the battery is ready to receive more amperage than when the alternator is idling. Accelerating the engine will charge the battery faster because the alternator increases the amperage.

Does Revving the Engine Charge Your Battery Faster When Jumping?

At this point, when the battery needs to jump, it has reached a significantly low charge level, so the battery is in an ideal state to receive more amperage (and charge) from the alternator.

When the alternator is activated above idle speed, it means that it has reached its maximum output potential, therefore, the battery will be charged faster.

It is advisable to accelerate between 1000 and 2000 RPM for about 4 minutes while the jumper cables are connected, this ensures that the battery warms up and charges faster.

Does Revving the Engine Hurt the Car?

Always be careful when accelerating the engine to charge the battery because this could affect the car.

If the car is in neutral or the engine is cold and you accelerate the engine this will cause excessive engine wear. Avoid accelerating it too often. However, warming up the engine beforehand makes acceleration less dangerous and can also help to charge the battery faster.

What is the Safest Way to Rev the Engine?

Here are some steps to safely accelerate your engine:

  • Step 1: Start the car and put it in neutral.
  • Step 2: Let the engine idle for about one minute, this allows the engine oil to circulate properly.
  • Step 3: Now, accelerate the car. Press the accelerator pedal until the needle on the dashboard reaches the red end.
  • Step 4: Slowly release your foot from the accelerator pedal until the engine idles again.

5 tips to keep your car battery in perfect condition

Every time our cars have more complex electrical systems. The batteries have not escaped this evolution, they are increasingly complex, safe, and efficient but still, we must perform good maintenance of the car battery if we do not want to take the unpleasant surprise of getting behind the wheel and the car does not start.

Our mechanic is the most suitable for this, but there are a number of measures we can take ourselves, such as checking consumption or the alternator.

Always notify your mechanic

The first thing to do is to include the battery in the periodic reviews of the car. Every time you visit the mechanic for a service or tune-up, ask him to also check the battery to see if it is in good condition or if it needs to be changed.

Avoiding exposure to cold

You should also keep in mind that factors such as the outside temperature of the car influence the performance of the battery. Extreme cold may prevent the battery from starting due to lack of amperage, so in winter, especially in cold weather, it is preferable to park undercover.

Switching off for long periods

Another issue to take into account is that the battery discharges even if we do not touch the car. This is something that not all drivers take into account, and if you are going to be away from your vehicle for a long period of time you should disconnect it so that it does not consume electricity.

All you have to do is disconnect the terminals, first the black (negative) and then the red (positive). However, when you are going to use the vehicle again, make sure you connect the terminals first, starting with the positive one.

Use the multimeter to check the battery

Density meter batteries are history, and most of those sold today require almost no maintenance beyond the precautions we’ve seen before. This saves us from dangers such as sulphation. What they do have is an orientation indicator that tells us the state of the battery. However, as it is not 100% accurate, you should not trust this integrated densimeter completely. So let’s see how to check the alternator and battery with a multimeter.

All you have to do is turn off the car and any electrical consumers such as radio or lights before opening the hood and put the multimeter in a continuous voltage measurement position. The red terminal is placed on the red terminal and black on the black or any naked part of the body. A result of 12.7 volts indicates that the battery is fully charged, while the battery below 11.9 volts is completely discharged. At 12 volts it is 25% charged, and at 12.2 volts it is half charged.

Charging the battery correctly

A final tip for good car battery maintenance is to know how to charge the battery correctly to avoid problems in the future. If you have run out of battery, the best thing you can do is to change the battery.

Of course, you will have to buy a new one and, depending on the type of battery it has, in some start&stop cars the mechanic should do it so as not to disconnect the whole electrical system of the vehicle.

One method that is well known is the tweezers, which allow us to borrow electricity from another vehicle’s battery to charge ours and start the car. Remember that you must follow the order of red terminal of the car without battery, red of the car with battery, black of the car with battery and black of the car with no charge. The other option is to push start, an emergency resource that many manufacturers do not recommend.


In answer to the question, yes, accelerating the engine charges the battery faster. If the battery is in a low state of charge, the engine speed increases the alternator amperage, so the battery charges faster.

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