Power Bank Buying Guide

The fundamental importance of a power bank is felt by every individual who is on the run 24/7. As they are outdoors for most of the day, they require a reliable power bank that could charge their electronic devices.

If you are somebody that falls in that category, you must have already owned several power banks. But if you have had trouble selecting the right one in the past, this article is just for you.

With our informative buying guide, we will tell you all the factors and elements to look out for a while buying a power bank.


What Can a Power Bank Charge?

Power Bank

It is common knowledge that a power bank can charge a phone. But did you know it can even be used to charge other electronic devices like your speaker and even laptops?

Basically, it can charge almost anything that needs to be plugged into the wall.

So, how does it work?

A power bank is not a simple battery. It uses sophisticated electrical circuitry to charge itself and further charge other devices.

The power is passed from the main USB charger to the power bank. It is stored, and when it is connected to another device, the power is transferred to it.

Two types of technologies are used in a power bank:

  1. Lithium Polymer: These batteries are more flexible when it comes to their shape and size. These are lightweight and more durable. In addition, it stands a lower chance of electrolyte leakage.
  2. Lithium-ion: If you need more power density, this is the right kind of technology for a power bank. Its batteries do not become more challenging to charge with time. When it comes to the price, they are significantly affordable.


Factors that Determine the Best Power Bank

Coming to our power guide, the following factors will help determine the best power bank, prompting you to make an informed decision:

Size of the Power Bank

Size of the Power Bank

Power banks are meant to be portable chargers that are convenient to carry. But this purpose will not be fulfilled if they are large in size, in addition to being heavy.

It goes without saying that a larger power bank will have more capacity. Mainly, there are three types of power banks in terms of sizes.


Small (2500-3000 mAh)

These power banks are easy to store and usable for mostly all smartphones. They are also affordable.

As they are small, they have limited capacity, rendering them not as helpful for smartphones with bigger batteries.

But if you are looking for something cheap for emergencies, this is the right size of a power bank.


Medium (3500-10000 mAh)

These power banks have more capacity than the small ones. So you can easily charge your smartphones with this one.

If you need to charge your phone twice a day, this is the one for you.


Large (10000 mAh+)

These power banks can give you more than four full charges. But with such a large capacity, their size also increases. It might be difficult to carry them in your handbags or bags.

Lastly, they would also be heavy on the pocket.

You can define your needs and choose the size of the power bank accordingly.



The capacity of your power bank means its total battery capacity. It is measured and denoted in mAh. It means milliamp hours.

For example, One Plus Nord has a battery capacity of 4115mAh. To charge this phone, the battery capacity of the power bank must be more than that. Even if the capacity is a little less, it is still usable. But you won’t be able to charge your phone to its full capacity.

Tablets and laptops will need higher-capacity power banks. There are models that range to 20000 mAh. These are expensive but worth the price.

But if you are going to use the power bank to charge something basic as a speaker or an earphone, a lower capacity will work just fine.


Power Output


It is also crucial to consider the factor of how fast your device will get charged with a power bank. This is also referred to as the power output.

You must have heard of fast charging smartphones. It simply means that it can pull in more amperes of power.

Different devices have different charging capabilities like half an amp, one, 2.5 amp, and even 3 amp.

A power bank with 1 amp will take time to charge your smartphone. The one with 2.4 amp is considered to be optimal.

But when the 2.4 amp power bank is shared with devices, it will slow down.

If you have to charge multiple devices, get the one with four or more amp.


Number of Ports

Number of Ports

If you want to charge multiple devices with the same power bank, you will need the one with more than one USB port.

Most of the power banks come with two ports. But it must be noted that when two or more devices are getting charged from the same power bank at the same time, the output will not be maximum.


Charge Indicators

Charge Indicators

It will be useful if a power bank has charge indicators that can tell you the remaining charge. In this way, you can charge or use it accordingly.

Some have single indicators, while others have multiple small LEDs. Modern power banks show the exact battery in percentage.


Wireless Power Bank

Wireless power banks are becoming common and more acceptable with time. They have adequate capacity, capable of fully charging your smartphones. As they are wireless, they are more convenient but comes at a higher cost.



Lastly, it is crucial to look at the price before you buy a power bank. They cost in a range of Rs. 100 to Rs. 2000. But we suggest that you look beyond the price and check the specifications before buying a power bank.


Tips for Using a Power Bank

Once you have bought a good and reliable power bank, you must use it correctly to make it more durable. The following tips can help you in doing so:

  1. Use your power banks regularly. Do not keep it lying around with a full charge capacity. If you are not going to use it for a particular time frame, charge a device till its entire battery is drained out.
  2. Store the power bank in a cool and dry place. Ensure that it is kept in a ventilated area.
  3. Do not use the device while it is charging through a power bank.
  4. Keep it away from moisture.
  5. Do not put them around any metal, like keys.



Choosing a power bank might seem insignificant, but the right decision can go a long way, especially during emergencies. Refer to the buying guide and make an informed decision. Then, handle your power bank with care, and do not forget to pack it the next time you go for a trip!

Founder at Best Indian | Website | + posts

I am tech writer who is passionate about technology and spearheads the core writing team on tech news

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