Best Power Bank

Power Bank Best

We spent 57 hours researching and testing power banks (USB battery packs) to see which would give us the bestquality charging device at the most reasonable price.  With an abundance of mobile devices in our lives, we had no shortage of products that needed to be powered up.  In the end, we loved the Romoss Up10 10000mAh Power Bank the most.

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Best Power Bank

Romoss Up10 10000mAh

The Romoss Power Bank is one of the few power banks we found that can be charged by popping out the AC wall plug from the side of the unit and plugging it into a 110 A/C wall outlet.Most other units use a USB charging cable.

This high-capacity,10000mAh unit is great for travel as it has a dual 2.1A/1A output and can handle both 100 and 240 voltages.  If you travel outside the USA, you’ll still need an adapter plug for the wall, but this unit is already built to handle the change in voltage. Plug in your smartphone and your iPad at the same time to top them off while traveling and you’ll never find yourself disconnected.

A bonus feature of this power bank is that it supports pass-through charging which means that you can charge the power bank and two devices at the same time.  Competing models don’t allow you to charge the power bank while it is charging another device.

Runner Up

Dulla Portable 12000 mAh Power Bank

The Dulla power bank offers super-fast charging in a sleek and lightweight unit.

Both USB ports have 5V 2A power which means that you don’t have to worry about which of your two ports will charge the quickest because they both will charge equally quickly.

This unit also comes with a flashlight to help you find anything from keys to your phone port, to a wall plug.  It is a great product that packs a punch in a small space.  Perfect for gift giving and it comes in four colors, so you’re sure to find one to fit anyone’s taste.

With thousands of positive reviews, you won’t go wrong when purchasing this power bank from Dulla.

In the box you will receive, 1 Dulla 12000mAh power bank, 1 Micro USB Cable, 1 User Manual.

What is a Power Bank?

Power banks are also sometimes known as USB battery packs.  Very simply put, they store power (electrical energy) for use at a later time when you can’t get your device to a wall outlet.

They consist of a battery in a case with a special circuit that controls power flow.  You can use power banks with nearly any portable device that can be charged using a USB cable such as your smartphone, tablet, camera, and GoPro.  Nearly anything that can be charged with a USB can be plugged into a power bank to recharge its battery.
Power Bank Types
These devices have become incredibly popular as the world becomes more and more dependent on mobile devices.  With this influx of use, our mobile devices become depleted of power more quickly than ever before.  A power bank can give your device that extra boost of energy when you are away from a wall outlet and can’t use your regular charger.

Power Banks are purchased based on their capacity rating which is measured in mAh and stands for milli-Ampere hour.  A higher mAh means that the power bank can hold and distribute more power to your device before the bank needs to be recharged.

Power Banks can come with one or more ports to use for charging, and each of these ports can come with a different Amperage Rating.  Be sure to compare this when you are purchasing as the amperage will determine how fast the power bank will charge your mobile device.

The below chart gives the approximate amount of power that each mAh rating will hold, and the time it will take to charge a mobile phone or a tablet.

Another good rule of thumb is to know the mAh rating of the device you want to charge.  Be sure to buy a power bank with a rating equal to or higher than that device.For example,the iPhone 6 battery is rated at 1810mAh so you would want to buy a power bank with an 1810mAh rating or more.

mAh Ratings vs. Charge Times

Power Bank Rating Mobile Phone Tablet
2000mAh Approximately 1 full charge Approximately 25%
5200mAh Approximately 2 full charges Approximately 50%
10000mAh 4 full charges At least 100% full charge

Power Bank Review

How We Selected

Power Banks have become ubiquitous in the world we live in today.  Look around, and you will see them being used everywhere. You can purchase them in any number of locations from shopping malls, to big box stores, to gas stations.  We have become more dependent on our portable devices and don’t want to be stuck without power.

Because of their popularity, we wanted to wade through the many choices available and to find the models that performed best.

When we first started selecting, we found over 5,000 devices available to purchase!  Gosh, we only wanted to test five…

We wanted to know what previous buyers thought of each model before we tested them.  This way, we could knock out any power banks that weren’t already liked by consumers.  Once we did that, we eliminated thousands of models but still had over 1,100 in the running.

Many of these were over $100, but we thought that a more reasonable price for most customers would be under $40.  Once we eliminated the higher-priced models, we were left with only 300 results.  Of course, 300 is still a lot more than five, so we set out to do some additional preliminary work so that we could whittle down our choices.

We decided to turn to online sites such as and to read up on their opinions since they know their stuff when it comes to technology.

Once we had their input, we could now understand the most critical aspects of choosing and testing power banks.  Next, we were off and running, choosing our top five power banks to test and review.
Power Bank History

Features to Consider

Battery Type–Power Banks can have a wide range of batteries, from Lithium ion to the newer, safer, Polymer batteries.  Know which type of battery is in your power bank as some airlines ban certain battery types in carry-on luggage.  Be sure to check which batteries the FAA allows in both carry-on and checked-in luggage.

Number of Ports – The more ports your power bank has, the more devices it can charge at once.  For example, two ports mean you can charge two separate devices simultaneously.

Capacity Rating – Capacity rating will let you know how powerful your power bank is regarding how many times it will be able to recharge your devices before needing to be recharged itself.

Charging Port Amperage – The amperage of the charging port will determine how quickly your device will charge.  Some power banks offer two charging ports, and they may have a different amperage rating from each other.  Be sure to know which of the two ports has the higher amperage if you need to charge a device quickly.

Because power banks come in a wide range of capacities, charging power, sizes, and weights, we wanted to be sure to include a graph with a side-by-side comparison of the five power banks we tested.

Romoss Up10 Dulla 12000 Jackery 12000 Mogix 10400 Anker PowerCore 20100
# of Ports 2 2 2 2 2
Capacity Rating 10000mAh 12000mAh 12000mAh 10400mAh 20100mAh
Weight 9.3 ounces 12 ounces 10.4 ounces 6.6 ounces 12.5 ounces
Dimensions 4.4 x 2.4 x 1.2 inches 6.1 x 3.1 x 0.5 inches 4.3 x 3.1 x 0.8 inches 5.3 x 2.9 x 0.5 inches 6.5 x 2.3 x 0.9 inches

How We Tested

We knew that comparing these five power banks would be a bit tricky because each is unique and different from the other regarding their power and charging ability as well as their size and weight.

In the end, we tested to be sure each unit held power for as long as the stated mAh capacity claimed it should, and that the unit charged our devices flawlessly.

We also wanted to compare how quickly they charged our devices and if they stood up to the amperage rating that was advertised.
Power Bank Features

What We Liked

  • We liked that the Dulla 12000 is slim and compact, yet still has great battery power that can charge our phone repeatedly without needing to be recharged.
  • We liked that the Romoss could be plugged right into a 110 Volt outlet to be charged, without needing to keep track of another USB cord.
  • We liked that the Jackery 1200 and the Dulla 1200 have a built-in LED flashlight to help find cords, plugs, etc., in the dark.
  • We liked that the Mogix is a US-based, family-owned company.

What We Didn’t Like

  • Although the Jackery 12000 worked perfectly and charged our smartphone easily, it was bulkier than the others which made it less portable than the other power banks we tested.
  • We didn’t like that most models didn’t come with a USB cord capable of charging Apple products. However, we already had the Apple-capable USB that came with our iPhone, so we just used that.


Romoss Up10 10000mAh

Romoss Up10 10000mAh
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The Romoss Up10 is a durable and well-built unit that lives up to its 10000mAh capacity rating.

We found that it provided our iPhone 6 with approximately five full charges with only one full charge of its battery.  To fully charge this power bank it should take only six hours which is faster than other models.

This unit has 4 LED display lights that light up as it charges to let you know the current charge level.

It comes with a built-in safety system that ensures protection for both you and your devices, including overcharging, short circuiting and overheating protections.

In the box you will receive, 1 Up10 power bank, 1 Micro USB Cable, 1 User Manual, and an 18-month Warranty.

Anker PowerCore 20100

Anker PowerCore 20100
View on Amazon

Despite its high power rating, this power bank is slim and compact and ready to slip into your purse, briefcase, or pocket.

It can hold an ample amount of energy and will be able to fully charge an iPhone 7 up to seven times when starting with a fully charged battery.

This device offers high-speed charging and recharges itself in ten hours when using a 2-amp charger.  If you are using a cell phone charger (which are usually 1 amp), it can take up to 20 hours to fully charge.

This power bank comes in your choice of either Black or White.

In the box you will receive, 1 power bank charger, 1 Micro USB cable, 1 travel pouch, 1 welcome guide.

The unit comes with an 18-month warranty.

Dulla Portable 12000 mAh Power Bank

Dulla Portable 12000 mAh Power Bank
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This power bank is designed with an ultra-slim and sleek design that comes in four color choices:  gold, black, silver, and rose.  This charger makes a great gift idea for a birthday, graduation, or any other gift -giving occasion.

At 12000mAh it is powerful enough to charge an iPhone 7 about five times before needing to be recharged.

We love that this unit offers dual USB ports for charging two devices simultaneously which is not a feature that all power banks have. Both ports offer 5V 2A power for quick charging.  The unit also has an LED light between the power inlet and the USB ports that you can use as a flashlight if needed.  Bonus!

This model uses a Polymer Battery which is 20% smaller and 30% lighter than an ordinary lithium battery which makes it half the weight of other power banks.

Best of all, it comes with a 30-day money-back guarantee as well as an 18-month warranty.

Jackery Giant+ 12000 mAh Power Bank

Jackery Giant+ 12000 mAh Power Bank
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This unit is perfect for travel because it comes with dual USB outputs and can, therefore, charge two devices simultaneously.

It runs off of a grade A Li-ion polymer cell with premium microchips to create a high-quality portable charger that can last 500+ charges over the life of the battery.

Its high-efficiency circuit board is made with US, as well as Japan-made,components, and the body is made of a premium aluminum shell casing.

For those who like a splash of color, this unit comes in black, gold, silver, and orange.  We also loved that it comes with a built-in LED flashlight that can be used to find cords, phones, ports, and the like if you need to plug-in in the dark.

Mogix 10400 Battery Charger

Mogix 10400 Battery Charger
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One of our favorite aspects of the Mogix power bank is that they are still a small, family-owned company that is known for its personal attention.

And we love that this product comes with a 100% satisfaction guarantee.

With one full charge, this power bank can charge an iPhone 7 four to five times and a Galaxy S7 three to four times.

It offers two high-speed ports that are rated 2.5A and 2.1A respectively for quick charging of your mobile devices.  The input is rated at 2A for fast charging of the unit itself.

The shape and design resemble an iPhone, and at only 6.5 ounces it is the lightest power bank we tested.


Not all power banks are created equal.  There are a variety of features and technical specifications that you’ll need to understand to choose the best model for your needs.  You will need to know what mAh stands for and how it affects your purchase.  Also, you’ll need to understand how powerful (amperage) the output ports are and subsequently, how fast they will charge your devices. We compiled the information you’ll need to understand these and other specifications of power banks in this handy guide.  We’ve done all the background work for you.  All you’ll need to do is get reading…..and charging!



Author: Danielle G.

Danielle is an Editor for ReadPlease and in charge of product testing...she started out in the IT industry, but then her love of wellness & whole nutrition led her to the Institute of Integrative Nutrition...when she's not reading up on that, she is listening to music, gardening, or trying to meet John Mayer.

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