Last updated: August 17, 2021

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Quick chargers are becoming more popular because they take less time to charge electrical devices. In fact, fast chargers charge the respective end device much faster than conventional chargers. They can carry more energy and thus save valuable time. Nevertheless, you should not overdo it with fast charging. This could have unpleasant consequences for your battery.

With our large quick charger test 2022 we want to help you find a suitable quick charger. To make your purchase decision as easy as possible, we have selected and compared the different types of fast chargers for you and compiled the respective advantages and disadvantages.


  • Fast chargers charge your device much faster than conventional chargers. They are available for smartphones, for example, but also for standard batteries.
  • Fast chargers are particularly suitable for those who rely on a full battery for their work. But people who are often pressed for time can also benefit significantly from a fast charger.
  • Although it can be very convenient to use a quick charger, you should not use it too often. If you use it too often, your device's battery can suffer. Therefore, the motto here is "less is more".

The Best Fast Charger in the United Kingdom: Our Choices

Guide: Questions you should ask yourself before buying a quick charger

What is a quick charger?

A quick charger is basically comparable to a conventional charger for mobile phones, for example. But it can also include chargers for batteries and rechargeable batteries.


Not only smartphones can be charged with a fast charger. Nevertheless, check whether the electrical device in question is compatible with a fast charger.
(Image source: / Thomas Kolnowski)

The small but significant difference to a conventional charger is the charging time. That is, the time it takes to charge a terminal device. Since a fast charger charges at higher currents, the respective end device can be charged in less than two hours. If the battery capacity of a terminal is very high, it can sometimes take longer than two hours.

How does a fast charger work?

The function of a quick charger is relatively simple. The best way to explain it is to use a mobile phone.

While a conventional charger charges your phone with a constant voltage (5 volts), a fast charger gradually increases the voltage (sometimes up to 20 volts). Just before your mobile phone is fully charged, the voltage is reduced again. This is to protect the battery of your mobile phone.


With a fast charger, the voltage is increased. This means that more current flows temporarily and your device is charged more quickly.
(Image source: / Thomas Kelley)

You can compare it to starting a car. If you accelerate too much, the tyres spin and get damaged. If you brake too hard, the tyres lock up and get damaged. But if you start slowly, accelerate carefully and then brake slowly, your tyres will hardly be affected.

Who is a quick charger suitable for?

A quick charger is basically suitable for anyone who wants to charge their electronic device faster. And who wouldn't want to save a little time?

So if you use electronic devices with integrated batteries, you should think about getting a quick charger. However, it would make sense to check beforehand whether the fast-charging function is supported by your electronic device.

Time is valuable. A fast charger can save you time.

A quick charger is also a good investment for those who sometimes forget to charge their mobile phone. This way you can supply your mobile phone with enough power just before a party.

A quick charger is particularly suitable for people who depend on a fully charged battery for their work. Whether it's a mobile phone that needs to be used constantly or a hair clipper.

What are the alternatives to a quick charger?

If you find that a quick charger doesn't quite fit your needs, we have picked out two alternatives for you.

Alternative Feature Capacity Charging time
Powerbank A powerbank is portable but needs to be charged as soon as it is empty The capacity depends on the size and ranges from 2500 mAh to 50,000 mAh It takes approx. 10 hours to charge (depending on capacity)
Solar charger A solar charger is portable and draws its energy from sunlight Capacity depends on size and ranges from 10,000 to 50,000 mAh It takes approximately 6 - 20 hours to charge a solar charger (depending on weather and capacity)

Each of the chargers listed here has its advantages. For example, you can charge your mobile phone on the go without needing a power socket. However, none of the devices presented offers a proper fast-charging function that charges your battery quickly.

Decision: What types of fast chargers are there and which one is right for you?

There are basically four types of fast chargers you can choose between when you want to buy a fast charger.

  • USB quick charger: A USB quick charger usually means a quick charger that charges the device via a USB cable
  • Car quick charger: Acar quick charger usually means a quick charger that can be plugged into a car
  • Wireless fast charger: A wireless fast charger is a fast charger that charges without a cable and via induction
  • Battery fast charger: A battery fast charger usually means a fast charger that charges batteries

So a fast charger is more versatile than you think. Therefore, pay close attention to which one you choose. To help you decide, we have summarised the advantages and disadvantages of the different fast chargers in the following section.

What makes a USB fast charger special and what are its advantages and disadvantages?

A USB fast charger is suitable for all electrical devices whose battery is charged via a USB cable. However, it is important to note that the respective electrical device must be compatible with the quick charger. Otherwise, there is a risk of damage to the electrical device. However, there are also many USB quick chargers that can be used universally.

In addition, a USB quick charger needs a power socket to draw power from. It is therefore not portable during the charging phase. However, due to its small size, it can easily be taken along. As soon as a socket is available, it can be used again.

  • Small size
  • Up to 60 watts of power
  • Compatible with many electrical devices
  • Mostly multiple USB ports
  • Not always compatible
  • Not portable (power outlet is needed)
  • Not all USB ports must have fast charging

Such a USB quick charger often has several USB ports. This means you can charge several devices at the same time. However, you should check which voltage is indicated for the respective USB ports. It may be that only one of the USB ports is suitable for the fast charging function.

What are the features of a fast car charger and what are its advantages and disadvantages?

A quick car charger is suitable for all cars that have a cigarette lighter or an on-board power socket (automotive socket). Here, too, it is important to note that the electrical device in question must be compatible with the quick car charger. Otherwise, the electrical appliance may be damaged. However, there are also enough quick car chargers that can be used universally.

A quick car charger does not have a connection for a socket. Therefore, it can only be used with on-board power sockets. The number of USB ports is also usually lower than that of a USB quick charger.

  • Small size
  • Can be used in the car
  • Compatible with many electrical devices
  • Not always compatible
  • Not portable (on-board power socket is needed)
  • Usually only two USB ports

A quick car charger is therefore particularly suitable for those who travel a lot with their car. However, a quick car charger is not suitable for the socket at home or at a friend's house.

What are the features of a wireless quick charger and what are its advantages and disadvantages?

A wireless fast charger works wirelessly. This means that your mobile phone is charged without you having to connect it to a USB cable. However, a power cable is still needed for the wireless fast charger itself.

An induction field charges your phone electromagnetically. All you have to do is place it on the induction surface. If your smartphone supports this technology, it can now be charged wirelessly.

  • Wireless charging
  • Easy to use
  • Visually appealing
  • No dirty USB ports
  • Not always compatible
  • Not portable (requires power outlet)
  • For smartphones only
  • Only one device can be charged

You should be aware that, according to our research, a wireless fast charger is only compatible with smartphones that have the so-called QI technology. Generally, only mobile phones can be charged with such an induction charger.

What are the features of a quick battery charger and what are its advantages and disadvantages?

A battery quick charger is intended for rechargeable batteries. Mostly for batteries of the type AA or AAA. But it can also be a quick charger for the battery of a drill or other electronic devices. This chapter, however, deals exclusively with quick battery chargers for rechargeable batteries.

Most quick battery chargers have four or more slots for the respective battery. This means you can charge several batteries at the same time. However, they are usually a little bulkier.

  • Sustainability
  • No costs for new batteries
  • Multiple batteries can be charged at the same time
  • Not always compatible
  • Not portable (socket is needed)
  • Exclusively for batteries

However, this small drawback is offset by environmental protection. If you recharge your batteries instead of disposing of them, you are doing something good for the environment.

You should bear in mind that not all batteries can be charged with such a quick charger. You will need to buy special batteries that are compatible with a fast charger. In most cases, however, you will be supplied with a set of rechargeable batteries.

Buying criteria: Use these factors to compare and evaluate quick chargers

In the following, we will show you which criteria you can use to find your way through the jungle of fast chargers.

The criteria to help you make a good decision for yourself include:

In the following sections, we explain what is important in each criteria.


Compatibility is a very important criterion that you should definitely consider. Otherwise, you may end up buying a quick charger that does not fit your device.


There are not only devices that need to be compatible. Your charging cable must also be compatible with your quick charger and your device.
(Image source: / Lucian Alexe)

It is not the case that every fast charger fits every end device. While there are some fast chargers on the market that can be used universally, there are also some that require a supporting function on the part of your end device.

There are also different connections on the respective devices. Therefore, make sure you know which charging cable you need for your device. The following overview should help you find the right charging cable:

  • Lightning: This connector was developed by Apple and is built into every Apple smartphone developed after 2012
  • USB Type C: Many new devices now have an integrated USB Type C port. This is supposed to make it possible to charge even faster. It should also make it easier to transfer data
  • Micro-USB: This connection is built into many electrical devices and has been the standard for mobile phones and other end devices since 2011

There is a lot to consider in terms of compatibility. Therefore, check exactly which interface is integrated in your device and whether it supports a fast charging function at all.

Charging power

The charging capacity is a central criterion that you should inform yourself about before you buy a fast charger. Some providers promise fast charging, but this often has little to do with a fast charging function.

To be sure whether a fast charger is actually a fast charger, you should look at the wattage. For a conventional charger, this is around 5 to 10 watts. If a charger with 5 to 10 watts of charging power is described as a fast charger, you should leave it alone.

Basically, you can assume the following rule: The higher the wattage, the more power the quick charger has.

So make sure that the wattage is high enough. But also take into account that a quick charger with two USB ports requires less wattage than a quick charger with four USB ports. So don't just focus on the wattage.

Number of USB ports

The number of USB ports determines how many devices you can connect to the fast charger. So if you have several electrical devices that can be charged with a fast charger, you should consider buying a fast charger with several USB ports.

As mentioned earlier, you should pay special attention to the wattage of fast chargers with multiple USB ports. After all, more devices require more power.

So think about how many USB ports you need for your purposes and be aware that you can only charge one device with a wireless fast charger.

Number of USB ports Required charging power
1 USB port approx. 15 watts
2 USB ports approx. 25 watts
4 USB ports approx. 30 watts

The number of slots in a battery quick charger should also be mentioned here. For example, there are battery quick chargers that provide four slots, but also some that have eight or more slots available.


Safety is a major concern for fast battery chargers. But with other types of fast chargers, too, you should always make sure that they have been tested. Otherwise, cable fires or similar damage can occur.

Batteries can leak. Therefore, short-circuit protection should be provided.

When using a quick battery charger, make sure that it has short-circuit protection. Free access to electronic components can lead to a short circuit. For example, if water enters.

There should also be overcharge protection. Without this, there is a risk that the batteries will be overcharged and thus become unusable.

Facts worth knowing about the topic of quick chargers

What can I do if my quick charger no longer charges quickly?

If your quick charger is charging slowly or no longer charging at all, it is either defective or there is another problem. We have written a step-by-step guide on what you can do.

  • Step 1: Check your power source. It is possible that a socket or multi-plug is defective. If your quick charger is not getting enough or any power at all, it will not be able to fulfil its potential. So use a different socket or multi-plug to check if this is the problem.
  • Step 2: Check your fast charger. You may have accidentally purchased a fast charger that does not have a fast charging function or is not compatible with your device.
  • Step 3: Check your device. Maybe your device is outdated or defective? Use a different charger and see if the problem persists. If so, it is quite possible that your device is responsible.

If you have completed all three steps and your fast charger still charges slowly, your fast charger is probably faulty. Unfortunately, this leaves you with only two options. Either you have it repaired, although the cost of this is likely to be higher than the quick charger itself, or you buy a new one and dispose of the faulty one.

How do I charge correctly with my quick charger?

How to use your quick charger correctly? That can't be so difficult. Yes it can! A lot can go wrong when charging your device. That's why we have three tips for you that you should follow.

  • Tip 1: Pay attention to compatibility. As mentioned earlier, compatibility is very important to ensure that you can charge your device safely and quickly.
  • Tip 2: Do not charge overnight. Your device will usually be fully charged in less than 3 hours with a fast charger. Therefore, if you charge overnight, your device will hang unnecessarily on the quick charger and lose battery power.
  • Tip 3: Only use your quick charger when you need it fast. If you have some time to spare, we recommend using a conventional charger. This will save your battery.

If you follow these three tips, your device's battery will thank you and your quick charger will last a long time.

Can my quick charger explode?

Normally, a fast charger should not explode because it is designed for higher power. However, due to manufacturing defects or external conditions such as high heat, an explosion can occur.

So you should be aware that a quick charger can explode in very rare cases.

If you are concerned that your quick charger may explode, you can watch it and check the temperature development. It is normal for a quick charger to get warm, but it should not get very hot. If it does, switch it off immediately and consult a professional about what to do.

Photo source: Lovushkina/