Power banks for Dummies – 2nd edition

Power banks for Dummies – 2nd edition

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Giving sequence to our last post , today we continue talking about power banks, their essential characteristics and the difference between the available models. We can find numerous models of power banks on the market – they come in various shapes, sizes and capacities. With this wide range of selection, it is easy to get lost in finding the model that suits you best. 

When choosing a power bank, there are two essential factors you should take into consideration:

  • Your device’s battery size

This information can be found on the package of your device or online. Usually, this information will appear in the battery section of the manual.

For example: Apple iPhone 6    

Non-removable Li-Po** 1810 mAh battery (6.9 Wh)

Or Samsung Galaxy S5

Li-Ion** 2800 mAh battery

** Lithium-Ion and Lithium-Polymer batteries are the most common rechargeable cell types found in power banks. Lithium-Ion cells are generally cheaper and limited in mAh capacity, while Lithium-Polymer cells can be larger and don’t suffer from a memory effect over time.

  • Charger specificationscharger spesifications
Charger specifications should be located on the USB adapter bundled with your device The information you are looking for is the output voltage and output current of the adaptor. In this picture here, it is 5.0V and 1.6A.
Now you have all the necessary information to start choosing the right power bank for your needs. There are a couple more things you should keep in mind: 
  1. The power bank should be at least the same size as your device’s battery, to ensure at least 1 full charge.
For example: For the Apple iPhone 6, your power bank should be at least 1810 mAh. If you have a Samsung Galaxy S5, you should look for a 2800 mAh power bank.
  1. The power bank should have output voltage and current equal or higher than your device’s charger specifications. Look for at least 5.0V and 1A or 2.0A, since most smart devices adopt these standards.
  1. The choice of a power bank also depends on what kind of device you are planning to charge. In order to calculate the number of charges any device can get you, use the following formula:

how to calculate number of charges on power bank

Tech term cheat sheet:


mAh mean milli Ampere/Hour. The capacity of a power bank is measured by mAh.


In the process of power transferring, there is always loss, due to resistance. It is impossible to transfer 100% of a power bank capacity to the device, so we should factor in this loss when calculating how many times an average device can be charged from a fully powered power bank of any given size. Efficiency ratings differ between power banks based on their cell type, component quality and environment. Ratings between 80% and 90% are the current industry standard.

Device Depletion

This is the state of the battery in the device you wish to charge. The lower its power, the more energy a power bank has to give to it, to bring it back to life. We consider charging from 20% to 90% a full charge, as the efficiency loss increases beyond these points, leading to wasted charging potential. For example – going from 5% to 100% can take exponentially more power than going from 30% to 100%.=

Choosing the one and only power bank for you




If you just need a cell phone battery charger, you can go with an entry-level power bank on a budget. Our Benni 5,600 mAh power bank is a great way to start. You can get up to 2 charges for most smartphones.






For an even more accessible charger, our one-shot Pardo 2,600 mAh model can easily top up your smartphone in a pinch.






Starting the camping season? Why not consider the Solis 1,200 mAh Solar charged power bank?  It has only enough juice for about half a phone of power, but don’t forget that it can charge itself in about 6 to 8 hours of sunlight.season? 








If you are looking for something truly mobile, our Fabrizio 8,0000 mAh power bank is a proven winner. It offers good capacity in a compact format, allowing you to charge 2 devices at the same time using 2 USB output ports. Because of its slim design, Fabrizio easily fits in a pocket, purse or bag.





Now, if you really want to get the most out of your power bank and need to charge multiple devices in addition to just about any phone, take a look at the Fidus T1012 11,000 mAh power bank.Fidus will satisfy all of your portable charging needs, completely charging your mobile up to 7 times or easily charging 100% of your ipad, tablet and other devices.


To sum it up, your personal requirements will determine what type of power bank you need to have. If you don’t carry too many devices when you travel, then you can buy a small and low capacity one, just to charge your cell phone. If you need to charge a tablet, an iPad or other more demanding devices, then it is important to have a power bank with higher capacity.

Stay charged! 

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Author Description

Natalia LIdovskikh

There are 2 comments. Add yours

  1. 26th September 2015 | maricel fonacier says: Reply
    interested to be re-seller but doesn't know how to start....
  2. 14th October 2015 | Natalia LIdovskikh says: Reply
    Good afternoon, Maricel. Your first step would be to submit New Distributor Form on our website.

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