What Is a Credit Card Power Bank?


a small and slim credit card power bank on an open wallet

Many people are interested in really small and lightweight power banks and credit card power banks are becoming more and more popular. This comes as no surprise, as this type of charger is extremely practical in terms of size and portability.

Credit card power banks are both extremely lightweight, thin, and compact chargers that you can bring with you in your wallet, purse, or even pocket. Most of them have a capacity of 3,000 to 6,000 mAh, which makes them the perfect backup charger for your mobile device.

If you want to know what exactly credit card power banks are and what features they have, all you have to do is keep reading this article!

How Small Are Credit Card Power Banks?

Credit card power banks have roughly the size of an actual credit card, which is why they can be so easily carried around and will fit in both purse, wallet, or pocket.

In order to be able to tell you the average dimensions of credit card power banks, I went ahead and checked the 30 most popular alternatives on Amazon. Here’s is what I found out:

Smallest Dimension3.3 x 2.1 x 0.35 inches
Average Dimension3.4 x 2.4 x 0.25 inches
Largest Dimension5.12 x 3.15 x 1.26 inches

So, on average, a credit card power bank measures 3.4 x 2.4 x 0.25 inches, which is really tiny, if you ask me.

a small credit card power bank next to a wallet and a credit card
A super slim and super small credit card power bank

And yes, they actually do fit in your wallet. I carry one with me at all times and really don’t notice it in my wallet!

How Much Does a Credit Card Power Bank Weigh?

Credit card power banks have somewhat lower capacities than most conventional power banks. This means that they have smaller lithium batteries inside of them, which, in turn, decreases their overall weight.

Additionally, this type of power bank is extremely small and thin, making it even lighter.

Once again, I went through the 30 Amazon power banks and this time check their weights. Here is the result:

Lightest Weight2.0oz
Average Weight2.2oz
Heaviest Weight7.0oz

And so, as the average credit card power bank will only weigh 2oz, it’s pretty safe to say that this tiny gadget will practically be of no burden to you when carrying it around!

What Capacity Do Credit Card Power Banks Have?

The capacity of credit card power banks ranges from 1,000 mAh to 10,000 mAh, which is definitely in the lower spectrum of the power bank universe.

Most such power banks will have a capacity of either 3,000 or 6,000 mAh, where a 3,000 mAh credit card power bank will be able to give your mobile phone one full charge and a 6,000 mAh power bank will be able to give it up to two full charges (does not apply to newest phone devices, though).

Now, if we are looking at the absolute lowest capacities, which would be 1,000 to 2,500 mAh, it must be said that these most likely won’t be capable of even one full charge.

I have actually tested by 2,500 mAh power bank several times myself and the best it could do for my Samsung Galaxy S20 was 50% (from 0%).

That’s why credit card power banks with lower capacities are mere emergency chargers, which is something to keep in mind, should you decide to purchase one.

How Long Do You Have to Charge a Credit Card Power Bank?

Due to their lower capacity, credit card power banks can be charged fairly quickly.

On average, a 3,000 mAh power bank needs 1 to 2 hours to be fully charged, while a 6,000 mAh credit card power bank needs between 2 and 3 hours.

What Devices Can a Credit Card Power Bank Charge?

As mentioned above, credit card power banks are best suited for mobile phones (both smartphones and iPhones), as they simply do not have enough juice to charge larger devices.

Some other devices that can be either partly or fully charged with a credit card power bank include:

  • Tablets
  • Cameras
  • Headsets
  • Loudspeakers
  • Bike Lights
  • Headlamps
  • USB Radios
  • Air Pumps
  • USB Mice

How Much Does a Credit Card Power Bank Cost?

Given their lower capacity and weight, credit card power banks are fairly cheap. A credit card power bank with an average capacity of 3,000mAh can cost as little as $15.

Obviously, the price increases with a higher capacity, but even more powerful models with a capacity of 6,000 or even 10,000mAh can sell for around $20 to $25.

Do Credit Card Power Banks Support USB-C?

The newest versions of credit card power banks now support charging via USB-C connectors, which makes this type of emergency charger even more efficient and practical!

USB-C power banks are able to charge your device faster than conventional USB-A or USB-B power banks and hence, recharging your phone on the go is as easy as never before!

Conveniently, many credit card power banks that have a USB-C plug still also have a micro USB plug for older phone models, which makes these power banks a very versatile choice.

Do Credit Card Power Banks Break Easily?

Thanks to their ultra-thin and lightweight design, as well as their hard case, credit card power banks are very durable gadgets that do not break easily.

The title credit card power bank probably made you believe that these chargers are in fact as fragile and bendable as actual credit cards, but that’s not the case at all.

I own several myself and have actually tried to break them a few times. But they have an extremely hard body that basically cannot be broken into two pieces.

Additionally, it’s usually not a problem to drop them either, as they’ll almost always land flat on one side and because there is no loose components on the inside that could get damaged.

What Is the Best Credit Card Power Bank on the Market?

Recommending a really good credit card power bank isn’t easy, because you have to find the perfect balance between a compact, slim design and power capacity.

The one I can warmly recommend is the Miisso 6000mah Ultra Slim Power Bank. It’s a little thicker than conventional cred card power banks, but it can still fit inside of a bigger wallet and will most certainly fit in any purse or bigger pocket.

What I value most about this power bank is that it has both a micro USB and a USB-C plug, which makes it way more versatile than most other power banks of this type.

Because not only can this credit card power bank charge two devices at the same time, but it’s also compatible with the newest phone devices that now more and more have USB-C ports.

And with only 4oz, this one is a real featherweight, considering its capacity of 6,000mAh.

All in all, a really powerful and compact credit card power bank that’ll serve you very well when you don’t have access to a wall outlet.

You can find the Miisso Ultras Slim Power Bank on Amazon here.

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