- How much electricity does a battery charger use? -

The electricity usage of a battery charger is relatively low but, exactly how much electricity does a battery charger use? 

And, how much does it cost us to recharge batteries?

The most reliable way to find out how much electricity does a battery charger use is to use a plug in power meter.

Battery charger electricity usage

According to our plug in power meter, our battery charger is continuously using 5,1 Watts (W) while charging four A++ batteries.

That means that the electricity charger is consuming 0,0051 Kilowatt hours (kWh) per hour. 

Given that we are paying to our electricity provider 0,217 euro per Kilowatt hour (kWh) we consume, to recharge the four A++ batteries we need to pay 0,011 euro per hour.

Because it takes to the charger 6 hours to recharge the batteries, we will be paying a total of 0,0066 euro to recharge our four A++ batteries.

If you would like to measure the electricity consumption of your battery charger or any other device at home using a plug in power meter, have a look to this video we have prepared for you.

Recharging batteries do both benefit your pocket and the environment, if some preconditions are met. If you would like to know more, have a look to the post we have prepared about this topic.

Disposable VS Rechargeable batteries

Electricity usage and cost calculator

If you cannot get a plug in power meter but you know the power consumption or your battery charger, the calculator below can be used to calculate the power consumption and the electricity cost of a device over a period of time.

You just need to adjust the values in the PARAMETERS section to your requirements and the calculator will automatically display the RESULTS section.


For example, if your battery charger:

  • Has a power rating of 13 Watts
  • It needs 6 hours to recharge the batteries
  • You need to recharge batteries 50 times per year
  • You are paying 0,2 euro (or dollars or pounds) per every kWh you consume 

You will be paying 0,78 euro (or dollars, or pounds, or…) per year in electricity costs.

A few other examples from our ‘Electricity usage calculators‘ page that may be of your interest:

Fridge electricity usage calculator
Freezer electricity usage calculator
Microwave oven electricity usage
Iron electricity usage calculator

Additional information

Not everybody it is familiar with terms like Watts (W), Kilowatts (kW) or Kilowatt hours (kWh) so if you would like to learn more about them, have a look to this video that we have prepared for you.

All our videos can be found in YouTube, in both English and Spanish languages.

If you are looking for saving electricity at home, have a look to this video where we provide some useful tips to reduce the electricity consumption and decrease the electricity bill.

Electricity conservation - Save and conserve energy

Energy conservation can be defined as the decision and the act of using less energy 

Energy conservation both benefit you and the environment 

The act of saving and conserving electricity does benefit you because you will be paying less on your energy bills. 

And it also does benefit the environment because conserving electricity prevents any unnecessary waste of natural resources.

Now, at individual level it may not look worth to try to save a few watts here or there. 

Still, every little counts and if hundreds or thousands of us do save a little every time, it will make an important contribution towards conserving our natural resources.


For example, if 9000 households would manage to save as little as 10 Watts per hour (0,01 kWh) worth of electricity per day, that would add to 32850 Kilowatt hour (kWh) per year. 

That is a considerable amount of electricity, but let’s add additional perspectives for clarity:

  • Assuming an average cost of 0,18 euro (or dollars, or pounds, or any other currency) we would collectively be saving nearly 6000 euro per year.
  •  To produce 32850 kWh of electricity it is necessary to use around 17 metric tons of coal or 56 barrels of residual fuel oil.
Have a look to this page for more information about the amount of resources needed to produce electricity.

In any case it is clear that small energy savings do really count when looking into the bigger picture.

We hope that you have found the information on this page informative and of value. 

If so, please consider to share or subscribe to our newsletter.

We dedicate a considerable amount of time and effort to create content and your support and engagement will encourage us to keep moving forward.

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Effiworkx blog

For more useful energy and water saving information and advice, have a look to our blog.

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