power banks

Power Banks: Portable, Affordable and Essential

It’s a fact that most of us are always rushing somewhere. We barely have time to sit down and take a breath. We need to constantly be on our feet, in our offices or schools. We need to always do something. In the age of smartphones we live in, the problem of easy and fast communication is solved for sure but for many years the downside to our portable phones was the battery life running out. Thankfully, that problem is solved now. With the invention of power banks, our batteries have become portable as well.


The market for power banks has grown tremendously over the last few years or so. Many manufacturers have surfaced producing newer and better power banks every month. With so many of them being made now, you need to identify which one is a poor quality power bank, and which one delivers what it is supposed to.

This review will compare some of the top searched for power banks in the United States to help you make a smarter purchase.

  1. Anker PowerCore Portable Charger (10,000 mAh model)
  2. Xiaomi Power Bank (10,000 mAh model)
  3. Rav PowerStation series (RAVPower 22,000 mAh model)
  4. Zendure A2 Power Bank (6,700 mAh model)
  5. ExpertPower Portable Charger (22,000 mAh model)
  6. EasyAcc Power Bank (20,000 mAh model)

What Makes a Good Charger?

With all devices, there are some things you need to look for, and others to look out for.

Size and Weight

A power bank is a handy portable gadget and therefore has to light in weight and small in size. It would look extremely ridiculous and impractical to carry a battery twice the size of your smartphone.

The Anker PowerCore 10,000 Power bank is gold standard when it comes to size and weight. It weighs only 6 ounces and has a vertical length of only 4 inches which is much lower than battery chargers with comparable specs. Coming up close is the Zendure A2 6700 mAh charger weighing 4.8 ounces and a size similar to the Anker PowerCore model. The Xiaomi 10,000 mAH battery charger weighs a total of 9 ounces, while the RAVPower 22,000 mAh weighs around 14 ounces. The ExpertPower 22,000 mAh weighs around 11.7 ounces. All of these chargers are good, adequate sizes and weights according to their power but the EasyAcc 20,000 Power Bank is a little more to the heavy side with a weight of 24 ounces.


If you’ve been paying attention to your physics classes, you’d know that nothing that comes out of an industry is a 100% efficient even if the product promises to say so. It’s important to select the power bank that is the most energy-efficient.

The Anker PowerCore 10,000 has an efficiency up to 60-70% which means it’s power rating is actually around 6,000-7000 mAh instead of the 10000 mAh it is supposed to have. That’s a good, passing percentage but the Xiaomi model definitely trumps this category. With a 93% efficiency percentage, the Xiaomi 10,000 mAh is definitely a more energy-efficient power bank. The developers took special care to make their product more efficient and true to their claims and definitely succeeded in it.

The Zendure A2 has a good efficiency rate as well – 80% while the RAVPower 22,000 mAh portable charger has a 15,000 mAh usable power which doesn’t make it as efficient as its competitors. The Expert Power bank and the EasyAcc chargers both have an average efficiency rating – nothing out of the ordinary.

Input & Output Ratings

While it’s true that power banks have saved us the trouble of finding a socket to plug in your charger, we can’t ALWAYS be carrying them around. The output rating of the power bank determines how fast your phone will charge so the higher this number will be, the quicker the charge. On the other hand, the input rating is an indicator of how quickly your power bank will charge. It’s ideal for both ratings to be high, but usually the manufacturers focus more on developing a better output rating for their power banks.

The Anker PowerCore model has a 2 V input rating and a 5V output current both of which are pretty great when it comes to power banks. The Xiaomi 10,000 mAh charger has an impressive two-way 18W charge which makes charging much faster.

The Zendure A2 and ExpertPower chargers lie more in the middle with inputs of 1.5A and 1A, and outputs of 2.1A and 2.1A respectively.

The RAVPower 22,000 mAh and the EasyAcc are a little more ahead at their game in this with impressive inputs of 2A and 4A, and outputs of 5.5A and 4.8A respectively.

USB Ports

The more the better! Some power banks come with more than one USB output port so you can charge multiple devices at a time. That’s a pretty useful feature if you’re tech savvy and have a collection of gadgets for your everyday use.

The Anker PowerCore, Xiaomi, and Zendure A2 all have only one USB port. The ExpertPower and EasyAcc models have a dual USB port. But RAVPower clearly wins this one with it’s not one, not two but three USB ports.


If the price tag isn’t an issue for you, you can skip this part and go ahead. But for those who need to know how much the power bank they’re thinking to buy costs, this might be a useful section.

Anker PowerCore 10,000 Power bank – US $24

Zendure A2 6700 mAh – US $30

Xiaomi 10,000 mAH battery charger – US $43

RAVPower 22,000 mAh – US $37

ExpertPower 22,000 mAh – US $16

EasyAcc 20000mAh Power Bank – US $43

Making the Decision

There are some features that may be unique to some power banks and not to others. For example, the RAVPower battery charger comes with two USB cables when all of the rest come with only one. The RAVPower also comes with a lifetime warranty card while most of the other brands have an 18-month warranty. The Xiaomi power bank is water and weather-resistant while the Zendure A2 has an impressive shock absorbing ability.

When making the final decision, ask yourself how you want to use your device. Do you need multiple USB ports? Do you need a small, unnoticeable charger or do you need to show off a trendy design? Are you comfortable with the price and warranty? And finally, how fast do you need your phone to get charged?

The bottom line is – there’s no harm in trying out any of these products because they all have their pros and cons, and there’s definitely no harm in trying out more than just one.