Review: TROND Bolt 12,500mAh Power Bank

TROND Bolt 12,500mAh Power Bank











  • You can charge 3 Devices at Once and it shares its max Output among the ports
  • It's quite small and lightweight


  • If you're charging 3 devices at once then charging will most likely be slow

Power banks can have high power capacities and can charge devices multiple times and that part of them isn’t really a surprise. When a power bank does have a high power capacity there are quite a lot of other components that come with it and that would be the usage of many USB ports so you can charge lots of devices at once. One of the main parts that definitely needs an upgrade is the charging speed that the ports have when the power bank has a high power capacity because if it has multiple USB ports then each port should offer a fast charging speed. That, unfortunately, is not the case with most power banks on the market.

This is the TROND Bolt 12,500mAh power bank that has an average power capacity that sits right before being a high capacity power bank. It uses 3 USB ports and it’s something quite unusual when it comes to a power capacity such as this. Let’s take a look if this power bank has some hidden power under its hood.

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Power Capacity:

The power capacity of this TROND Bolt power bank is 12,500mAh and the conversion of power for its power capacity is going to fluctuate quite a bit when you use it. The reason the conversion rate fluctuates depending on how you use the power bank is that it has 3 USB ports and the max output of the power bank is 3.4A. So using all 3 ports of the power bank at once with the Max Output being used would result in a poorer conversion rate.

In this case, we’re just going to assume that you’re going to be using two ports at the same time and half of the max output is being used at once.

3.7 x 12,500 = 46,250 / 5 = 9,250

 TROND Bolt 12,500mAh Power Bank
(Output Power Capacity = 9,250mAh)
Phone CapacityTROND Bolt 12,500mAh Power Bank Left Over Capacity after One Charge

Number of Full Charges for the Device
iPhone SE9,250mAh1,624mAh7,626mAh Left Over

5.6 Full Charges
iPhone 69,250mAh1,810mAh7,440mAh Left Over

5.1 Full Charges
iPhone 6 Plus9,250mAh2,915mAh
6,335mAh Left Over

3.1 Full Charges
iPhone 6s9,250mAh1,715mAh7,535mAh Left Over

5.3 Full Charges
iPhone 6s Plus9,250mAh2,750mAh6,500mAh Left Over

3.3 Full Charges
Samsung Galaxy S69,250mAh2,550mAh6,700mAh Left Over

3.6 Full Charges
Samsung Galaxy S6 Edge9,250mAh2,600mAh6,650mAh Left Over

3.5 Full Charges
Samsung Galaxy S79,250mAh3,000mAh6,250mAh Left Over

3.0 Full Charges
Samsung Galaxy S7 Edge9,250mAh3,600mAh5,650mAh Left Over

2.5 Full Charges
Apple iPad Mini 29,250mAh6,470mAh2,780mAh Left Over

1.4 Full Charges
Apple iPad Mini 49,250mAh5,124mAh4,126mAh Left Over

1.8 Full Charges

So if you’re using the power bank moderately by using two USB ports with it then it’s going to Output 9,250mAh of power capacity that you’re actually able to use. That is still a really good Output power capacity after its conversion because you’re going to be able to charge lots of different types of devices to max power.

Power Capacity for Smartphones

Firstly, smartphones are the number one device that you want to charge this power bank with, because low capacity smartphones such as the iPhone 7 with its 1,960mAh capacity is able to charge to its full power about 4.5 times; the iPhone 7 doesn’t exactly have a low power capacity but it does have a capacity that is quite a bit lower than smartphones that have a lot higher capacities such as the Galaxy S8. The Galaxy S8 smartphone has a battery capacity of 3,000mAh and that means it’s only able to charge to its full power 3 times.

Whatever smartphone you have, this TROND Bolt power bank has got you covered with a few full charges for your phone.

Power Capacity for Tablets

The power capacity is also enough for charging tablets. With that said, it’s important to know that if you do choose to charge a tablet with this power bank then it’s going to take a good chunk out of the power capacity and leave you with about enough power capacity to charge a smartphone to its full power only once or maybe twice.

Charging Mini tablets like an iPad Mini 2 or an iPad Mini 4 means that you can charge them to full power only once and the power bank will have quite a lot of power left to use. However, charging a full-sized tablet such as an iPad Air 2 with its 7,340mAh capacity will leave very little power; so it’s going to be up to you to decide how much you want to charge your tablet up to.

So to get the most use out of the TROND power bank, it’s best to charge smartphones and to charge tablets when you really need it and not charge them full power, but just enough power that you need with the tablet.

Output Charging:

The TROND power bank has 3 USB ports and each of those 3 USB ports is capable of a charging speed of 5V/2.4A and the max Output of the power bank is 3.5A.

Charging 3 Devices at Once

As a result, charging three devices at once with the Max Output of 3.5A being reached would result in each of the ports outputting 5V/1.1A charging speed and that is quite a slow charging speed for most modern smartphones and tablets; as most devices are able to charge to charge a lot faster than just a single amp.

Charging 2 Devices at Once

Charging two devices at once with the Output of 3.5A being reached will result in each of the two ports having a charging speed of 5V/1.75A and that is a lot better than a 5V/1.1A charging speed that the ports would be giving if you were charging three devices at once. Then if you want the best charging speed that this power bank has to offer then you should charge a single device at a time.

It’s best to charge a single device at a time because the power bank is able to Output a charging speed of 5V/2.4A from its USB port then. A charging speed of 5V/2.4A is a max standard charging speed that is able to charge most smartphones and tablets near or at their max charging speed. Tablets such as iPads have a max charging speed of 2.4 Amps so it’s best to charge them alone if you want to charge them quickly.

With all that said, it’s important to know that this power bank does not feature Quick Charge so Quick Charge compatible devices are not able to charge at their max charging speeds.

Input Charging:

The recharging speed of this power bank is 5V/2.0A and if you use a 2 Amp USB wall charger or higher to recharge this power bank then you’re able to recharge it to its full power within 6-7 hours.

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Size and Weight:

For its power capacity, this TROND power bank is quite small and lightweight.

It has a length of 5.6 inches, a width of 2.4 inches, and a thickness of 0.9 inches. The weight of the charger is 10.4 ounces. So this power bank is able to go anywhere and everywhere with you and can possibly fit into a pocket. Holding the charger in a single hand is also possible, however, the power bank is quite heavy with its weight so that part is going to depend on what the person thinks about the weight; since this TROND power bank nearly weighs a pound.

Functional Components:

All of the functional parts of the power bank are in the same general area, it’s just that they’re on different sides.

On the long side of the power bank is where there are the 3 USB Output Ports, on the short side is where there’s the Micro-USB Input port and a flashlight. On top of the power bank is where there is a power button and 4 Blue LED power capacity indicators.

Charging automatically starts once you connect a power bank in the device and charging stops once your devices are charged to full power or if there’s nothing connected to the power bank. With that said, the power button does hold a function which is to turn on the flashlight by double tapping the button to turn on the flashlight and turn off the flashlight by double tapping it again.


Structure and Material:

The entirety of the power bank is made of plastic and it has 3 pieces that make it whole; which is is the top and bottom pieces and the centerpiece of the power bank. It has a solid build quality that is able to take light drops to the ground and be used every day.


Then on the tech side, the power bank has safety tech features that are able to keep charging stable and safe for you and your devices. Even when you’re charging 3 devices at once, the power bank manages to stay cool or at least warm most of the time.


This TROND Bolt 12,500mAh power bank has quite a lot going on with it and for the most part, it does a great job to make itself reliable. However, it doesn’t reach the amazing type of charging capabilities.

It has 3 USB ports so you can charge 3 devices at once, however, charging 3 devices at once with this power bank isn’t the best thing to do because the devices that you’re charging are going to be charged slowly. It would have made more sense to just install the power bank with just 2 USB ports so users would have a better charging experience.

Other than that, the power bank does a great job at providing a well-rounded portable charging experience.

Anguo 3-Port 10,400mAh Power Bank

Similar Power Bank



The power capacity is very good for smartphones and charging tablets to its full power can take a lot from the power bank. It’s best to charge 1 or 2 devices at once because the Max Output of 3.4A is going to give out very slow charging speeds if you charge 3 devices at once.


It’s quite a small power bank that is a bit heavy on the weight side. With that said, it can still go anywhere that you want with it.


Even though the power bank is made of plastic, it still has a solid build quality that makes the portable charger withstand light drops to the ground. Also, it doesn’t heat up too much when you’re charging 3 devices at once.


It’s a reliable power bank for the most part because of its powering and design capabilities. But it could do some things better.

Specs of the TROND Bolt 12,500mAh Power Bank:

  • Capacity:            Advertised: 12,500mAh            Output Capacity: 9,250mAh
  • Output:

Each USB Port: 5V/2.4A

Max Output: 3.5A

  • Input:     5V/2.0A Via Micro-USB Input
  • LED Power Indicators: 4 Blue LED Power Capacity Indicators
  • Size: 5.6 x 2.4 x 0.9 inches
  • Weight: 10.4 Ounces


The TROND Bolt power bank does have its faults with not having a high enough max output for charging 3 devices at the same time efficiently. It’s still a neat power bank that gives a great charging experience with its 3 USB ports, it’s just that most of the time you’re going to want to charge 1 or 2 devices at once for the best experience.

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