Last updated: August 19, 2021

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We carry our mobile phones everywhere we go, as they are a centre of communication, order and entertainment, so we all get a little desperate when we see that our battery is low and we don't have a charger to hand.

We've gathered all the information you need to help you choose between the best Power Banks. We took the task of studying user reviews, the most important technical details and even the most common questions buyers have about these products.


  • Power Banks are also known as portable batteries or chargers.
  • The capacity of a Power Bank is measured in mAH, and the more you have the more power you have to charge batteries.
  • These portable power sources can recharge phones, ipods, tablets and many other devices that receive power via USB cable.

The best Power Bank: Our Picks

Buying Guide

Power Banks are also known as portable batteries or chargers.
(Photo: Aleksandar Tomic/

What is a Power Bank?

A Power Bank is a portable battery that you can use to recharge your mobile devices. It is really useful for anyone who considers it a necessity to have access to their phone constantly, as well as for those who want to go on a trip without the worry of running out of charge along the way.

These mostly work with USB cable outlets, making them compatible with all mobile devices that recharge using one of these cables, such as phones, tablets, ipods and even portable speakers. They can also be fitted with other output types and adapters to increase compatibility.

The capacity of these portable chargers is measured in mAH, which stands for milli Ampere Hour, and the more mAH you have the more times you can charge a device before the Power Bank needs to be charged again.

  • They are small and portable
  • They can recharge multiple devices at once
  • They are capable of recharging devices multiple times
  • They can recharge mobile devices anytime, anywhere
  • They are very easy to use
  • They need time to recharge
  • Their ability to hold charges slowly decreases as they are used
  • If they suffer problems while recharging they can damage attached devices
  • If they suffer problems while recharging they can damage attached devices
  • They can reach high temperatures
  • Cheap Power Banks tend to have an extremely short lifespan

High Capacity Power Bank VS Low Capacity Power Bank

When looking for a good Power Bank for your mobile devices you will find that these devices offer a variety of features, the most notable of which are their mHA capacity and size.

This is because the main reason we look for these portable chargers is because we need to keep our devices constantly charged without needing to charge more than we need.

High capacity Low capacity
They can charge a high need battery device multiple times They are intended for use with mobile devices with less demanding batteries
They last for days before needing to be recharged again They need to be constantly recharged
They are useful for families or groups as they often offer multiple USB outputs They are useful for people travelling alone or who want to travel light
They need longer recharge times They do not need a long time to fill their charge
They are slightly larger and heavier They are compact and lightweight
They have a higher price tag They are usually cheaper

As you can see from the comparison chart, a high capacity Power Bank is ideal for very long trips, or for group trips where multiple people need to recharge their phones, or for charging demanding battery devices such as tablets and portable speakers. It's worth bearing in mind that these Power Banks tend to be larger in size, enough to require considerable space in purses and bags.

A low capacity Power Bank is best for people who constantly use their phone throughout the day, but will not need more than one or two charges. Their smaller size allows them to fit into trouser or jacket pockets or any handbag compartment.

Try to buy Power Banks only from reputable sources, as there are often many poor quality replicas with a very short lifespan. (Source: FreePhotosART/

Buying criteria: What to look for when buying a Power Bank

Thanks to the fact that these mobile chargers are simple, you'll quickly learn the things to look out for when buying one. Here we've put together the most important features in Power Banks to give you an idea of what you're buying:

MHA capacity

How many mHA a Power Bank has will define how many times you can charge your mobile device. Always keep the battery capacity of your mobile devices in mind before buying a Power Bank, as you don't want to be short of power after purchasing one.

For example, if you have a phone with a 3,000 mHA battery and a 10,000 mHA Power Bank, you will be able to charge your phone at least 3 times. On the other hand, if you have a tablet with a 10,000 mHA battery and a 5,000 mHA Power Bank, you will only be able to charge your tablet halfway.

Another recommendation is to read reviews to find out if the mHA capacity that a Power Bank claims to offer is correct, as unfortunately, many suppliers tend to "inflate the numbers" of their products to make them more eye-catching.

The capacity of a Power Bank is measured in mAH, and the more you have the more power you will have to charge batteries.
(Photo: Ruslan Sitarchuk/


How big or small you need your Power Bank to be will depend on your personal preference, as Power Banks tend to be heavy and uncomfortable to carry in your pocket for long periods of time.

A high capacity Power Bank will always be larger and heavier than a low capacity Power Bank, as they need that extra space to give the internal battery more room. If you don't mind carrying a Power Bank in your bag or purse, then you will have no problem buying a larger Power Bank.

But if travelling light and comfortable is your thing, then you'll be better off buying a smaller, lighter Power Bank that can fit in your trouser or jacket pockets. These smaller chargers usually hold enough charge to recharge an average phone at least 3 times.

Wireless Charging

Certain Power Bank models offer QI (IQ) charging. This is a technology developed by the Wireless Power Consortium that allows you to charge mobile devices wirelessly. You just need to place your phone on top of these chargers and your phone will be charged.

While it may be seen as useful and eye-catching, the truth is that it is not a widely distributed technology among mobile devices, and the maximum supported distance is usually 4 centimetres, which is a bit prohibitive in terms of movement.

Quick Charge

Quick Charge, or Quick Charge, is a charging technology developed by Qual-comm that allows compatible mobile devices to charge much faster than normal. This technology can work both ways, as there can be Power Banks that recharge and are recharged quickly.

Portable chargers with fast charging are usually a bit more expensive than the rest, plus they need a wall charger that is compatible with this technology, but despite that it is something really convenient.

To choose the perfect Power Bank you need to find a balance between portability and capacity. Think about how you're going to carry it around and how long you need to be away from a charging wall. (Photo: rawpixel/

Additional features

There are certain things that Power Banks usually come with that will make them more convenient to use, but that you can skip when looking for the one you want. Here is a short list of the most striking additional features.

LED torch: Some Power Banks often come with small LED torches, these don't drain the battery charge too much. They are really useful in small Power Banks as they can serve as pocket torches in case of emergency.

Multi-purpose parts: If you don't like charging with cables, then you will be interested in a Power Bank whose parts can be removable to be used as a cable to charge your phones. These parts can be reattached to the Power Bank once you have finished charging your mobile device.

Charge indicators: A charge indicator is the way the Power Bank tells you how much battery power is left, some use small displays and others use LED lights.

(Featured image photo: Сергей Толмачев/