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Best power banks: Reviews and buying advice

  • Jun 15, 2022
  • 1137

Have you ever been in a situation when your phone dies right before an important call, or when your laptop runs out of battery in a monthly review meeting?

Although mobile devices are convenient in countless ways, they rely on batteries to function. In the above situations, all you need might just be a power bank.

There are a number of factors before buying one though, like how much space you need, how much you're willing to pay, and how compact and portable you'd want it to be. In the article today, we will introduce the best cell phone power bank brands and guide you to select the one suit for your needs.

Types of cell phone power bank

In general, power banks are made using one of two types of rechargeable batteries: lithium-ion or lithium-polymer. Lithium-ion power banks are the more prevalent of the two. However, lithium-polymer power banks have lately gained market share.

Customers' primary concerns about Lithium-ion and Lithium-polymer power banks are "How different do they perform?" and "How much do they cost?" and, in particular, "Which one is better?"

1. Lithium-ion

Lithium-Ion batteries, or Li-Ion batteries, are the batteries you often see in smartphones and laptops. Lithium-Ion stands out in the smartphone world because of its high performance. Li-Ion batteries can store more power than Lithium-Polymer (Li-Po) batteries, but in exchange for that, it suffers from lots of disadvantages. Here are the pros and cons of Lithium-Ion:

Pros of Li-Ion:

  • High power and voltage
  • Cheap production cost, thus, cheaper devices

Cons of Li-Ion:

  • Performance degrades over time. Older Li-Ion doesn’t work as well as newer ones
  • More dangerous to use. Li-Ion is exposed to more risks of exploding during charging.

2. Lithium-polymer

Lithium-Polymer or Li-Po batteries aren’t usually seen on cheap and affordable phones or laptops. The reason why is that Li-Po batteries are obviously much more expensive to manufacture. What you’ll get for that expensive price is a type of battery that can be made super thin, super small, or even curved. Here are some pros and cons of Li-Po batteries:

Pros of Li-Po battery:

  • Thin, small and can be curved
  • Safer to use
  • Stores power longer. If not used, Li-Po batteries can store electrolytes for months

Cons of Li-Po battery:

  • Lower performance, thus, can’t power extreme devices
  • Expensive and shorter lifespan

Buying Guide

1. Size and Capacity

In general, the larger the battery, the greater the capacity and number of ports. Power banks that fit easily in your pocket are usually good for a full phone charge or two, but anything meant to keep you running all day would necessitate the use of a bag or a purse.

On the pocket-friendly front, most smaller batteries that emphasize mobility have a capacity of 5,000mAh or less, providing only enough energy to charge most phones at once.

When you reach above 5,000mAh, the battery size grows to the point where it won't fit into your thin pants but can still fit in a jacket pocket. There are even batteries that can power computers while also charging the average phone ten times. Of course, they're the largest and heaviest of the bunch and must be transported in a bag.

2. Input and Output Ports

The kind of port (or ports) on the battery influences not just compatibility with the devices you wish to charge, but also charging speed. Most battery packs will feature a normal USB-A connector for charging the battery (power input) as well as transferring energy to your smartphone (power output). 

However, with the majority of phones, tablets, and laptops embracing the USB-C standard, you'll frequently see a USB-C connector in addition to a USB-A port.

3. Fast charging

Another thing to think about is how rapidly a power bank can charge your phone. Voltage and amperage are the units of measurement for battery output. The quantity of electricity flowing from the battery to the connected device is referred to as amperage (or current), whereas voltage represents the amount of potential energy. 

Wattage and total power are calculated by multiplying volts by amps. To make a gadget charge quicker, most manufacturers either change the voltage or raise the amperage to increase the overall wattage. Most rapid charging involves increasing or dynamically changing the voltage.

To put it as a reference, smartphones nowadays can charge themselves as fast as 45W, or some manufacturers might make it to 65W or 75W; laptops are often charged between 45W to 65W.

Higher charging wattage might not always be a good idea. There are two main reasons for this: one, it will be more dangerous to charge your phone, especially while being used; two, it will shorten the lifespan of the battery. Therefore, take it into consideration.

4. Pass-Through and Wireless Charging

Before choosing a backup battery, there are a few more factors to consider. Pass-through charging allows you to power items connected to the battery while simultaneously charging the battery itself. This is a very handy function if both your phone and backup battery are running low on power.

Wireless charging has also grown in popularity since it allows you to charge compatible devices without the use of a wire, simply by placing them on top of the battery. Qi is the dominant standard used in compatible Apple and Samsung phones, and certain battery packs support it as well.

5. Charging the battery pack

Unfortunately, no battery pack that miraculously recharges itself when it runs out of power has been created. However, they are generally easy to charge.

If you need one right away, be sure it's ready to use when you get it. Some will require charging at home before they can be used.

To charge, connect the provided cable to the battery pack's input connector. Connect the other end, which is often a regular USB, to a wall charger or other power source.

The input of the battery pack varies from 1Amp to 2.4Amps. Simply simple, the higher the input number, the faster the recharging. Most wall chargers offer up to 2.4Amps, but if you're in a hurry, it's worth double-checking the charger, since a 1Amp charger may take twice as long.

Famous brands

1. Anker 

You have probably heard of Anker before. It’s a well-known brand originated from Germany, with the aim of creating safe equipment with modern designs.

Anker power banks can have capacity ranging from 5000 mAh to 30000 mAh, for you to charge your device up to 5 or 6 times before needing a recharge. Most Anker power banks currently sold on Amazon right now feature at least 2 USB ports, with both micro USB type-B and micro USB type-C inputs.

Anker is one of the top brands in the world right now, so obviously, they design their devices with latest technologies, including the fast charging, wireless charging, safe voltage technology, and more. 

Anker power banks are usually priced higher than power banks from other brands manufactured in other countries; however, the aim of making power banks safe ensures that Anker-branded products are loved by customers worldwide.

2. Miady

Miady, like the 2-Pack Miady, offers an 18-month warranty on its goods. These chargers can power up to 99 percent of cellphones. They've got your iPhone or Android phone covered! Their product has received certifications such as CE, FC, RoSH, and others. Your safety is always the number one priority. They're so light and thin that you can take them with you everywhere you go. Keep your phone's battery charged at all times.

Miady designs are not the most special, with mostly two colors white and black. The brand’s power banks follow the modern design pattern, suitable for a teenager or energetic people. As a consequence, Miady power banks are sold at very good prices for almost everyone, of just $11 to $130.

3. Romoss - the brand for big power banks

The first thing you’ll notice about every Romoss power bank is the size. The Romoss power banks are made with the motto of being the biggest so you literally won’t have to worry about charging for about a week.

Romoss batteries are a little ugly and heavy, because they have to carry a huge amount of electrolytes inside them. On the outside, they still provide you with necessary ports like USB-A and micro USB-C, along with micro USB type-B for input.

4. Baseus - Affordable but usable

The power bank brand from China, Baseus, doesn’t seem to compromise anything. They don’t want to sell super cheap products with bad quality and also super expensive products. Baseus power banks are affordable to most users, and have what most users need.

With that motto, Baseus features simple designs with mostly black color, so you can fit it with different types of clothes, outfit, or bags. Baseus power banks have large capacity within an acceptable size. We don’t want a super large capacity in a super small size, because it would be dangerous.

In conclusion, Baseus is the overall best for people who just need a simple affordable power bank.

5. Minrise

You might be wondering what this Minrise brand is? We were too.

We want to introduce you to the best brand we can find in making solar-powered power banks. Whether you're out and about, traveling, shopping, or watching movies, you don't have to worry about your phone running out of power; your power bank will come in handy.

There are two things happening inside a Minrise power bank. 

  • Firstly, the electricity is generated when the power bank is put outside under the sun. 
  • Secondly, the electricity is stored inside the power bank for use when the sun has set or on rainy days.

Minrise created a new concept of power bank that charges itself using both solar power and traditional electricity power. Although it’s a new brand in the competition, it’s worth your try.


1. Are power banks good for your phone?

Power banks that fit easily in your pocket are usually good for a full phone charge or two, but anything meant to keep you running all day would necessitate the use of a bag or a purse.

2. What is the best power bank for Android?

This 87W Powercore III Elite by Anker charger should be powerful enough to charge virtually any smartphone rapidly, as well as certain tablets and laptop computers. Anker also provides a Powerport III Pod wall charger to guarantee that charging the power bank does not take too long.

3. Is it OK to use a power bank everyday?

It is recommended that you charge your power bank at least once every three months to keep it in excellent operating order. Though there is no clear evidence, it is generally recommended that power banks be charged only up to 80 percent and discharged only up to 20 percent for greater performance and a longer lifetime.

4. Can a power bank destroy a phone battery?

A low-quality power bank might harm your phone's battery as well as its charging connector. It may also pose some security concerns. Overcharging a low-quality Lithium-ion power bank, for example, can result in the power bank exploding. Having the incorrect voltage in your power bank will cause issues.

5. How many mAh is a good power bank?

If you want a greater capacity power source for an extended period of time, a portable power bank with a high mAh capacity, such as 40,000 mAh, is your best choice. You do run the risk of compromising mobility with this choice, so decide ahead of time how you will store it for quick access.


If you're always attempting to maintain your phone at 100% charge or are concerned about running out of juice while out and about, we've got the information you're looking for. This article covers which chargers have various kinds of ports and how many, allowing you to charge several devices at the same time.

Finally, the cell phone power bank part concludes. If you find it useful when shopping, please follow us so that you may stay up to speed on the latest changes in the future posts!

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Maybelle McGlynn By, Maybelle McGlynn
Maybelle McGlynn is the Account Director at CooDaGroup and a qualified copywriter and proofreader. She has spent six years copy editing and copywriting for B2B and B2C clients and has experience in freelance and in-house arts marketing and digital content creation. Wendy likes to write about language and literature, digital marketing, history, current affairs, and arts and culture. In her spare time she enjoys yoga, reading and writing fiction.
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