Review: UNU Superpak 15,000mAh 4.4A Portable Charger

UNU Superpak 15,000mAh 4.4A Portable Charger











  • 3 Charging Ports
  • 2.4A Recharging Speed
  • Great Build Quality


  • Not Very Fast Charging
  • Low Capacity For Size
  • Large & Heavy

The first thing you need to know is that you CANNOT and SHOULD NOT purchase these UNU power bank from UNU’s website because their chargers are very overpriced on their website.

The power bank that we’re about to review, The UNU Superpak I4 is $129.99 on the UNU website. The price of the power bank on Amazon is $39.99 and that price matches what the power bank has to offer.

UNU creates some fascinating power banks that are capable of doing what other power banks don’t do. Strangely, though, their take on the power banks isn’t exactly “Better”, it’s simply different and can be better for those looking for the features that their portable chargers hold.

Let’s take a look at what makes this power bank different, good and worse than the rest.

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Power Capacity

The capacity of the Superpak I6 is 15,000mAh. It’s not considered a High capacity power bank in our book because you still have to account for the power capacity that’s lost during charging and we’re rating the power bank as a 13,000mAh portable charger.

Along with a relatively high capacity, the power bank has three charging ports and this where is get disappointing.

 UNU Superpak 15,000mAh 4.4A Portable Charger (Output Power Capacity = 13,000mAh)Phone CapacityUNU Superpak 15,000mAh 4.4A Portable Charger Left Over Capacity after One Charge

# of Full Charges for the Device
iPhone SE13,000mAh1,624mAh11,376mAh

8.0 Full Charges
iPhone 613,000mAh1,810mAh11,190mAh

7.1 Full Charges
iPhone 6 Plus13,000mAh2,915mAh10,085mAh

4.4 Full Charges
iPhone 6s13,000mAh1,715mAh11,285mAh

7.5 Full Charges
iPhone 6s Plus13,000mAh2,750mAh10,250mAh

4.7 Full Charges
Samsung Galaxy S613,000mAh2,550mAh10,450mAh

5.0 Full Charges
Samsung Galaxy S6 Edge13,000mAh2,600mAh10,400mAh

5 Full Charges
Samsung Galaxy S713,000mAh3,000mAh10,000mAh

4.3 Full Charges
Samsung Galaxy S7 Edge13,000mAh3,600mAh9,400mAh

3.6 Full Charges
Apple iPad Mini 213,000mAh6,470mAh6,530mAh

2.0 Full Charges
Apple iPad Mini 413,000mAh5,124mAh7,876mAh

2.5 Full Charges

Output Charging

All of the charging ports offer “Smart Tech Charging” but that means nothing when all the charging outputs don’t have max charging capabilities.

The first charging port has an output of 5V/2.4A and is the only charging port that is able to live up to smart charging standard because it’s able to give maximum standard charging speed.

The other two charging ports give a 5V/1.0A output. That’s unacceptable because it’s one of the slowest charging speeds and it’s labeled as “Smart Charging”.

The 1 Amp ports will charge smartphones and tablets very slowly, although you’d use the 2.4A port to charge tablets and smartphones with the 1.0A ports; there are plenty of smartphones that charge faster than just 1 Amp.

Another thing is that since the power bank has three ports and three devices can be charged at the same time. The power bank’s capacity doesn’t match the charging capabilities of the power bank.

If you’re purchasing this power bank, because you expect to charge 3 devices at the same time, then the capacity will be drained quickly, since the capacity of the power bank isn’t that high at all. Although, you can expect it to last for 2 days if you’re using it constantly.

Input Charging

When the power bank does deplete quickly, then there’s a recharge speed that isn’t featured on many other power banks.

The power bank is recharged via Micro-USB (Which isn’t anything new) and the recharge speed is done at a 5V/2.4A rate of charging speed.

Not many power banks recharge at a max standard charging rate and this is somewhat of an equivalent exchange for the power bank being under-capacity and under-powered with its Output because you can expect the power bank to recharge to full capacity in about 5-6 hours.

We think that there was a trade-off with making two output 2.4A and the Input 1.0A; Although it’s great to have a fast recharging speed, the user is taking advantage of the power bank the most when it’s being used to charge their devices and not when it’s charging.

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Size and Weight

It’s a bulky portable charge that isn’t meant to be held in the hands but on the functional design side, the power bank is very well done.

A length of 4 inches, a width of 4.5 inches and a thickness of 0.8 inches. So it’s quite a large power bank and a heavy one that weighs 11 ounces.

The best way to make this power bank “Portable” is to put it into a bag or simply put it somewhere where you can pick it up and place it down at your location because walking around with it will prove to be very cumbersome.

Functional Components

On the functional design side of things, the power bank is beautiful. All functional aspects of the power bank, except for the 4 LED power capacity indicators (which are on top of the power bank), are all on one side panel.

The power button is placed at the edge of the panel and is really big. Next are the three USB Outputs that are lined up horizontally next to each other. Then on the other end of the panel is the Micro-USB Input. Everything is where it can be used instantly and there’s no guessing where is what and what does something.

Just one thing that we found annoying is the labeling of the two 1.0A charging ports as “Smart”, which is totally false since all they’re offering is one of the slowest kinds of charging speeds.

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The build of the power bank is surprisingly good considering that it’s big and bulky. The materials all throughout the power bank is varnished plastic that can be quite susceptible to scratches and smudges.

There’s the base body of the power bank and two side panels. Some power banks with side panels tend to have poorly placed side panels that stick out, like the Vinsic 20,000mAh power bank.

However, the Superpak I6’s side panels are placed very well and showed no sign of coming out and the body won’t warp.


It’s an alright power bank that you can rely on. The most reliable part of the charger is that you can charge 3 devices at once and the power bank is portable enough to be taken to a destination and be used. Its also got a fast recharge speed so you can use the power bank again quite quickly after it has been used.

Then there are the rest of the aspects of the power bank that doesn’t make it so reliable. You may be able to charge 3 devices at once, but the power capacity of the power bank is low at 13,000mAh and if you do charge 3 devices at the same time, then the power will deplete quickly.

If you don’t plan on charging 3 devices at the same time with this power bank, then we recommend avoiding this power bank altogether since the size and weight are not the most portable facets of the power bank charger.

It provides a reliable experience for those that are searching for a portable power bank that is able to charge 3 devices at once, everything else about the power bank is rather mediocre.

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The power capabilities of the Superpak I6 are definitely below the standards of what it should be. It’s nice that the power bank offers to charge 3 devices at once, but not all the ports are capable of maximum charge.

Actually, 2 of the 3 ports are only capable of charging at 1 Amp.

It doesn’t help that the capacity of the power bank is underwhelming and can be drained rather quickly if you’re recharging 3 devices at the same time and if you’re not using this power bank to charge 3 devices at the same time, then it’s best to look for alternatives.


The design of the power bank is quite alright if we’re talking about the functional placement of things.

There are LED power indicators on top of the power bank. The rest of the things: Power button, 3 charging outport ports and the Micro-USB Input are on a single side. Then there are the negative things which is that the power bank is very large and very heavy and should only be carried in a bag and only be used at a destination.


The build of the power bank is solid with the power bank having a varnished plastic casing. There’s the center uni-body and the two side panels of the charger.

In some cases, power banks with side panels tend to have the side panels come loose and leave an opening in the power bank, however, that’s not the case because the panels are placed very well and the battery doesn’t swell to warp the body.


It’s a High capacity power bank that is a false high capacity power bank.

Its power capacity and charging capabilities fall short of what’s to be expected from a power bank of its standard. It’s power bank that’s going to be a great reliance if you plan on charging 3 devices at the same time with it because that’s really the only way you’re going to get the most out of this power bank.

If not, then there’s not very much to look forward to, other than a low powered and highly non-portable power bank.

Specs of the UNU Superpak 15000mAh 4.4A Portable Charger:

  • Capacity:                 Advertised Capacity: 15,000mAh        Output Capacity: 13,000mAh
  • Output:

Port 1: 5V/2.4A

Port 2: 5V/1.0A

Port 3: 5V/1.0A

  • Input: 5V/2.4A
  • LED Power Indicators: 4 LED Indicators
  • Size: 4.6 x 4.0 x 0.9 inches
  • Weight: 13.2 ounces
  • Comes with a Micro USB cable


The UNU Superpak I6 power bank tries its best to show itself that it’s a big player in the power bank world.

However, it’s just not ready to put on its big shoes. A power capacity that’s alright if it were actually 15,000mAh but is actually 13,000mAh and 3 charging ports just don’t match up with their charging speed. Along with a heavy and bulky size, the power bank isn’t an ideal choice for portable power if you’re not taking advantage of the 3 charging ports.

It may have a fast recharge rate and with a great design but the charging speeds and the power capacity; Which are the most vital things for a power bank, are not up to their standards.

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