Review: KMASHI Compact 5,000mAh Power Bank

KMASHI Compact 5,000mAh Power Bank











  • Small Size
  • Great Design
  • Fast Charging and Recharging at 2 Amps


  • Poor Conversion Rate
  • Needs Better build components for charging to make the charging high quality
  • Should conserve power capacity through better design methods

Here at Charger Harbor, we’ve talked about lots of mini power banks how there’s a new generation of power banks beginning to be created. We’ve actually done reviews on such power banks such as Anker’s PowerCore 5000 and Aukey’s PB-N37 5,000mAh power bank.

This KMASHI power bank basically fits into the same category that those two chargers are in. This new generation of portable chargers is able to offer more in the way of charging and still hold onto their awesome portable abilities.

Find out what KMASHI has stirred up with this small portable charger and if it’s able to live up to their famous 10,000mAh power bank.

Anker PowerCore 5000 Review


Power Capacity:

We’ve already reviewed one KMASHI power bank with a capacity of 10,000mAh. It proved to be really good at providing the optimal amount of power that was necessary.

With this mini power bank, though, the capacity falls short. This portable charger does try to join the new generation of small portable chargers but it fails to provide the right capacity. This power bank is rated as a 5,000mAh capacity, but the conversion rate is very poor and you’re going to really get a power capacity of 3,700mAh.

It’s a disappointment because with most chargers with its same design, they usually take advantage of Panasonic battery cells that have great conversions rate of energy but it this case you’re going to lose 1,300mAh of power capacity.

Charging Smartphones

With the loss of so much energy, you can still expect the charger to charge devices to their max capacity and still have some power left over.

Although this mainly goes for smartphones that have a battery capacity of about 2,500 or less. If you’re charging smartphones like the Samsung Galaxy S7 Edge that has a capacity of 3,600mAh; Then you can expect to use the full power of this mini charger.

Charging Tablets

The capacity can’t exactly cater to tablets very well because tablets have a much higher power capacity but with that said, the capacity can very well charge a tablet to its half capacity if it’s the iPad Mini.

Overall the capacity is an underwhelming aspect of the power bank because it’s supposed to meet the standards of this new generation of mini portable chargers like the PowerCore 5000 or Aukey’s PB-N37, but it doesn’t. However, there’s a reason that the real capacity of the charger is lower than the stated capacity.

 KMASHI Compact 5,000mAh Power Bank (Real Capacity 3,700mAh)Phone CapacityKMASHI Compact 5,000mAh Power Bank Left Over Capacity After One Charge

# of Full Charges for the Device
iPhone SE3,700mAh1,624mAh2,076mAh

2.2 Full Charges
iPhone 63,700mAh1,810mAh1,890mAh

2.0 Full Charges
iPhone 6 Plus3,700mAh2,915mAh785mAh

1.2 Full Charges
iPhone 6s3,700mAh1,715mAh1,985mAh

2.1 Full Charges
iPhone 6s Plus3,700mAh2,750mAh950mAh

1.3 Full Charges
Samsung Galaxy S63,700mAh2,550mAh1,150mAh

1.4 Full Charges
Samsung Galaxy S6 Edge3,700mAh2,600mAh1,100mAh

1.4 Full Charges
Samsung Galaxy S73,700mAh3,000mAh700mAh

1.2 Full Charges
Samsung Galaxy S7 Edge3,700mAh3,600mAh100mAh

1.0 Full Charges

Output Charging:

The charging Output speed of the KMASHI mini power bank is faster than a traditional portable charger. Most power banks of its size or smaller ones have a charging output of 5V/1.0A  and this means that there is less heat generation since there’s less of a current passing through the power bank.

In this case, the KMASHI charger has an output of 5V/2.1A and this charging speed along with the compactness of the charger is what makes the capacity deplete so much. There’s more heat generated which is why there’s so much power capacity that’s gone.

Now let’s discuss the actual charging speed. As I stated above, the Output charging speed is 5V/2.1A; This charging speed is great for smartphones and tablets because it’s near the max standard charging rate of 5V/2.4A.

Nearly all smartphones will charge at their max speed, except for smartphones that are compatible with Quick Charge because smartphones that are compatible with Quick Charge, charge at their fastest speed when they use a Quick Charge charger.

Tablets will charge near their max charging speed, but it’s important to remember that a power bank of its capacity will only charge a tablet about halfway through or less than half.

Input Charging (Recharging):

The recharging speed of this small portable charger is near the same as the Output speed by being 5V/2.0A.

Although we stated that the real capacity of this power bank is 3,700mAh, when the charger recharges, it’s still filling up to 5,000mAh. The recharging speed is faster than most mini chargers and as a result, you can expect a portable power bank to recharge fully in about 3 hours.

Aukey 5,000mAh Pocket Review


Size and Weight

The KMASHI compact power bank does things a little different when it comes to its design. The charger is not exactly a circular cylindrical shape like a PowerCore+ Mini; rather the form factor is oval shaped. Even so, the size dimensions are quite alright.

Its got a 3.9-inch length, 1.4 inches in width, and a 1.1-inch thickness. The weight of this charger is 4.2 ounces, which can still be quite weighed down but it’s lighter than most higher capacity portable chargers.

When you take into account the power bank’s dimensions it really is a “Take Anywhere” charger because you can place it into your product along with your smartphone to charge.

Or simply hold it in one hand if you want to use your smartphones while it charges. It has no problems fitting into a bag or container but honestly, a power bank of this size is not meant to be constrained by a bag because you can use it while it’s on you.

Functional Components

The functional placing of this charger is done well. You’ll find all the functional components on a single side, which is the side panel of the power bank. The USB charging Output and Micro-USB Input are side by side. Then there’s the 4 Blue LED light indicators and the power button.

The charger automatically begins charging once a device is connected to it. So the power button is really meant to simply check the power capacity of the power bank if it’s not charging. The 4 LED power indicators turn on while the device is charging.

However, it would have been better to have the same design Jackery Mini because LED lights would be off and to check the capacity of the power bank while it’s charging a device, is by simply pressing the power button; this way the power bank wouldn’t use energy to power the LED lights and more power capacity would go into charging your device.

Overall, the KMASHI has a similar design that can provide the same awesome portability and simple to use interface that other power banks offer as well.

Similar 5,000mAh Power Bank


Structure and Material

Most of the power bank’s body is covered with a rubber molding cover and the tip of the charger, where all the functional things are, is the exposed plastic. It’s a really well-built power bank and the rubber molding really makes the structure stronger by being able to hold everything together.

There’s no need to worry about anything becoming loose or falling out because all the components are well built into the charger.


With everything on the outside being quite good, it’s the inside of the power bank that could use some work. Although KMASHI doesn’t mention it, the power bank doesn’t really feature any Safety tech. The power bank can become pretty heated up and this means that the overall capacity will deplete a lot over the long-term.

This also leads to an underwhelming power capacity that this power bank offers because quite a lot of power is lost during charging. I realize that heat is a big factor of losing power capacity but a power bank is going to be used a lot and as a result, it should withstand the test of time.

In this case, KMASHI should consider building their chargers for the long-term because people depend on power bank as an option of charging that should be reliable.

Lumina 5,200mAh Power Bank Review


It’s a reliable enough portable charger. What I mean by this is that the power bank has its limits when it comes to power usage. This is definitely a small portable charger that you can use on a daily basis but as long as you charge it fully for the next day.

The power capacity that’s depleted during charge is the main flaw. If you want a mini power bank that can offer you more than just a single charge, then we recommend going for a more stable portable charger like the Anker PowerCore 5000. This is because the KMASHI compact charger is going lose 1,300mAh of capacity.

Even with all that said, though, no matter what smartphones you’re charging, this power bank is either going to charge it fully or at least near full.

Some smartphones may even leave it with one more full charge to go. It all comes down to what smartphones you’re charging. For iPhones, this power bank would be great because iPhones tend to have smaller capacities.

The design is done well with its small dimensions and lightweight, it can be taken practically anywhere.

The build side of things are questionable on the inside of the portable charger with it becoming heated and over the long-term, the power bank’s performance pertaining to power capacity can become bad.

Jackery Pop Slim Power Bank Review



The KMASHI Compact heavily under-delivers with its capacity by providing a real capacity of 3,700mAh. You can still expect most smartphones to charge up to their full capacity and even for smartphones to leave the power bank with power capacity to spare. However, a 5,000mAh charger should be closer to its real capacity.

The charging Output and Input speed are quite fast at 2 Amp charging. You can expect smartphones to charge at their max speeds and if you’re charging a tablet, it’ll do well there too. However, the fast charging is somewhat the cause of the lost power capacity.


Dimensions and weight of this small charger is very similar to power banks just like it. It can fit in a pocket quite easily even with a thickness of 1 inch or you can hold it.

All the functional components are on a single side of the power bank. The charger automatically starts charging once a device is connected to it, and the power button is mainly used to check power capacity when the power bank is off.

It would have been a good design choice to leave the 4 LED power indicators off when the power bank is charging a device as a way to conserve power.


It’s a great build on the outside with the power bank holding strong with a rubber wrapping and a plastic body.

However, the inside could use some work with the charger’s constant heat issue; this can cause long-term damage to the battery and as a result, decrease the power capacity even more than it already is.


It’s a reliable portable charger for the most part by being able to provide a small and powerful charging experience. We just wish the power capacity would actually stand true to the advertised capacity.

More Mini Power Bank Reviews

Specs of the KMASHI Compact 5,000mAh Power Bank:

  • Capacity:            Advertised: 5,000mAh             Output Capacity: 3,700mAh
  • Output:      5V/2.1A
  • Input: 5V/2.0A via Micro USB Input
  • LED Power Indicators: 4 LED Power Indicators
  • Size: 3.97 x 1.49 x 1.18 inches
  • Weight: 5.6 Ounces


The KMASHI compact power bank does a good job at being small and highly portable. Its got fast charging and recharging capabilities that will provide you with a great charging experience.

All the functional things are easy to find and use. With all that said, it the portable charger still needs to be strong from within because the heat generation is able to deplete the power capacity quite a lot and as a result, you’re not going to get the full package that this small power bank is supposed to offer.

Leave a Comment