Review: Aukey 10,000mAh Power Bank PB-N51

Aukey 10,000mAh Power Bank PB-N51

Aukey 10,000mAh Power Bank PB-N51










  • Has Two Charging Ports
  • Small and Slim size with a 10,000mAh Power Capacity


  • Low Max Output

Power banks, for the most part, have their sizes and weight as a result of what their power capacity is. The general rule is that lower the power capacity, then smaller the power bank will be and higher the power capacity the larger it will be. However, as we move forward, more charging electronics companies are able to fit higher power capacities into smaller compartments. As a result, we’re able to have more long-lasting power with us while we’re on-the-go.

This the Aukey 10,000mAh PB-N51 power bank that actually has quite a small size and slim form factor enough to fit into your pocket.

Anker PowerCore 13000 Portable Charger


Power Capacity:

The power capacity of this power bank starts at 10,000mAh and during charging it’s going to be getting a pretty average conversion rate.

3.7 x 10,000 = 37,000 / 5 = 7,400

The usable amount of power that you’re going to be receiving is going to be about 7,400mAh. That’s still a good amount of usable power as you’re able to charge most devices a few times over.

Charging Smartphones

That is true when it comes to smartphones as most of them are able to charge about 2-3 full times. Even higher capacity smartphones like the Galaxy S8 and the Google Pixel are going are able to charge to their full power twice with this power bank.

Charging Tablets

If you’re charging larger devices like tablets like the iPad Mini 2 or 4 series then they’re able to charge to their full power once. However, charging larger tablets like iPad Air 2 will take the entire power capacity of the power bank; charging the largest 12-inch tablet from Apple will not result in a full recharge as the tablet has a 10,000mAh power capacity.

The conversion rate does a great job as providing a lot of power that can still be usable for charging quite a few devices to their full power a few times.

 Aukey 10,000mAh Power Bank PB-N51
(Output Power Capacity = 7,400mAh)
Phone CapacityAukey 10,000mAh Power Bank PB-N51 Left Over Capacity after One Charge

# of Full Charges for the Device
iPhone SE7,400mAh1,624mAh5,776mAh Left Over

4.5 Full Charges
iPhone 67,400mAh1,810mAh5,590mAh Left Over

4.0 Full Charges
iPhone 6 Plus7,400mAh2,915mAh4,485mAh Left Over

2.5 Full Charges
iPhone 6s7,400mAh1,715mAh5,685mAh Left Over

4.3 Full Charges
iPhone 6s Plus7,400mAh2,750mAh4,650mAh Left Over

2.6 Full Charges
Samsung Galaxy S67,400mAh2,550mAh4,850mAh Left Over

2.9 Full Charges
Samsung Galaxy S6 Edge7,400mAh2,600mAh4,800mAh Left Over

2.8 Full Charges
Samsung Galaxy S77,400mAh3,000mAh4,400mAh Left Over

2.4 Full Charges
Samsung Galaxy S7 Edge7,400mAh3,600mAh3,800mAh Left Over

2.0 Full Charges
Apple iPad Mini 27,400mAh6,470mAh930mAh Left Over

1.1 Full Charges
Apple iPad Mini 47,400mAh5,124mAh2,276mAh Left Over

1.4 Full Charges

Output Charging:

There are two charging ports and even though two charging ports is usually a good thing with power banks, we kind of have mixed feelings in this case. That’s because each of the ports is capable of Outputting 5V/2.4A and that’s great. But the Max Output of the power bank is 2.4A.

This means that if you’re charging two devices at once with this Aukey PB-N51 power bank, then each of the ports will most likely Output 5V/1.2A since the Max Output is 2.4A. As a result, to get the fastest charging speed possible, you should use just a single port at a time to receive the full benefit of 2.4 Amp charging speed.

Since 2.4A charging is actually a very good charging speed because most smartphones that aren’t compatible Quick Charge are able to charge at their max charging speeds. We say this because this power bank does not feature Quick Charge. On the bright side, larger devices like iPads are able to charge at max speeds of 2.4A if you’re charging them alone.

Input Charging:

The input of the power bank is alright as it’s 5V/2.0A via a Micro-USB input port. So you should use a 2 Amp USB wall charger to recharge the power bank at its max charging speed. It will take 4-5 hours for a full recharge when using a 2 Amp wall charger.

Lumina 15,000mAh Compact Portable Charger

Similar Power Bank


Size and Weight:

The best part of this power bank is its portability. That’s because it’s small enough that it can be held in your hand or you can place it into your pocket.

It has a length of 5.8 inches, a width of 2.9 inches, and a thickness of 0.5 inches. The weight of the power bank is 7.9 ounces. You won’t have any problems taking this power bank anywhere and you also have to remember that you’re carrying a 2-port 10,000mAh power bank in your pocket; which is very neat.

Functional Components:

It’s a very sleek power bank as none of the parts on it protrude. However, there are quite a lot of parts that are on each side of the power bank.

On the short side is where there are the two USB ports and in between, them is the flashlight. On one side is where you’ll find the power button and also the 4 LED power capacity indicators. On the opposite long side is where there’s the Micro-USB Input port.

Charging automatically starts when you plug a device into the power bank and that leaves the power button with the main feature of turning on the flashlight by holding it down.


Structure and Material:

The power bank has a solid build on each side of it has a rubber-like material and the sidelining is made of plastic. And that’s basically the only build qualities that it has and by being minimalistic the power bank has barely any parts that are able to get damaged.


On the tech side, the power bank does make use of few safety protections that allow it to be safe to use for you and the power bank.


The most reliable aspect of this power bank is that you’re able to take it anywhere with you and it’s so easy to do. As the power bank is so small and slim that it can fit into your pocket or you can simply hold it in a single hand and charge your smartphone.

The only unreliable aspect is that if you’re charging two smartphones at once, then the charging speed of that two devices will be cut short as the Max Output of the power bank is 2.4A. In the end, the most reliable way to use the power bank is to use a single port at a time.

RAVPower 12,000mAh External Portable Charger

Similar Power Bank



The power capacity is enough to charge most smartphones a few times to their full power. The max output could use some work as the best way to use the power bank is through just a single port.


It’s a small enough power bank that you’re able to fit it into your pocket and that can’t be said about too many other 10,000mAh power banks.


The build quality is quite good with the two side structures of the power bank being rubber.


For what it has, this Aukey PB-N51 power bank is quite reliable with its power capacity and size. The charging speed could be improved and then the reliability would be even better.

Specs of the Aukey 10,000mAh Power Bank PB-N51:

  • Capacity:            Advertised: 10,000mAh            Output Capacity: 7,400mAh
  • Output:

Each Port: 5V/2.4A

Max Output: 2.4A

  • Input:    5V/2.0A Via Micro-USB Input
  • LED Power Indicators: 4 LED Dotted Power Capacity Indicators
  • Size: 5.8 x 2.9 x 0.5 inches
  • Weight: 7.9 Ounces


The power capacity and size of a power bank both connect, but that kind definition is changing as we’re able to fit higher power capacities into smaller compartments. It won’t be too long until we’re able to fit 20,000mAh power capacities into something as small as this Aukey PB-N51 power bank.

Review: Aukey 10,000mAh Power Bank PB-N51 was last modified: by

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