A power bank is a very useful and handy gadget that allows portable charging of a device. It is the best solution when we do not have access to a traditional power source, and we see that our smartphone is at risk of discharging.
Each power bank has a specified:
- capacity, expressed in milliamp hours (mAh)
- Power, shown in watts (W)
- current intensity measured in amperes (A)
What is the best power bank capacity?
This is a very individual matter. The market offers small power banks with a capacity starting from 5000 mAh, allowing you to charge your phone only once. However, for most people, such a small capacity is not sufficient, so they opt for power banks with a larger capacity of around 10,000 mAh, 20,000 mAh, and much larger. Power banks with larger capacity increase the number of charges and also allow charging multiple devices at the same time. However, pay attention to its size and weight. Power banks with very large capacity are very efficient but much heavier and more expensive.
Power banks can also be divided based on the type of battery they contain.
This refers to a lithium-ion or lithium-polymer battery. A battery equipped with a lithium-polymer battery is a more expensive solution, but it has a much larger capacity, and its charging time is shortened. Consider how often you want to use it. Will its use be only occasional, in only crisis situations, or do you often have problems accessing traditional charging and its frequent use will be unavoidable?
When purchasing the right power bank, it is very important to check what is the allowable charging power of your device. Today’s power banks support fast charging technology – Fast, Quick, Ultra, or Super Charge. By properly selecting the technology used, which your smartphone supports, you will ensure the most efficient and safe charging for your device.
Modern power banks are protected against overvoltage or overload, so we know that charging a device with such a battery is completely safe. Also, pay attention to whether the power bank has additional ports, allowing you to charge multiple devices simultaneously.
A useful element when choosing is also the choice of the type of charge level indicator, which may have LED diodes or a small LCD display, informing about the current charge status. The choice is up to you, but the one with the LCD display may prove to be more accurate.
It is also worth considering whether we are looking for a power bank to which the device must be connected with a cable, or if we would prefer to charge the device wirelessly. Then we must remember to check if our device supports QI wireless charging technology.
Romoss – a popular brand from Hong Kong now available in our store
We have introduced another highly regarded brand to our offer, which is the Romoss company. The brand’s manufacturer offers high-quality equipment. Its offer includes capacious and durable power banks, making charging even faster and safer. The Power bank Romoss SW20Ps+ 20000 mAh stands out for its high capacity and fast bidirectional charging with a power of 18 W. It has 3 USB ports and a digital LED screen informing about the actual charging status, as well as the voltage and current of charging. Thanks to the Fit Charge technology used, the power bank ensures wide compatibility with other popular devices. 
Power bank Romoss UR01 10000 mAh is the perfect battery, which can be used, among other things, during bike trips thanks to the adjustable, stable holder that can be attached along with the phone to the bike’s handlebars. Its capacity is 10,000 mAh, allowing you to charge your smartphone several times. It is additionally equipped with 2 USB ports, saving you time and quickly charging other devices that need extra energy. 
Power bank Romoss SW30 2680 mAh is a battery equipped with a large capacity and also a number of 5 additional ports – 3 USB-C output ports and 2 USB. The device is completely safe, protecting against overvoltage, overcharging, or any short circuit. Fast charging PD and Q3.0 and SW30 will restore your device to work at an express pace. 
If you are really very demanding and the above proposals are not sufficient for you, we can offer you a Romoss PEA40 power bank with a truly enormous capacity of 40,000 mAh. Thanks to one USB output and two USB-C ports, you can charge 3 devices simultaneously. The battery, thanks to its powerful capacity, will charge devices multiple times. For example, an iPhone 8 can be charged up to 14 times and an iPhone 11 about 8 times. The power bank is extremely safe, thanks to a 10-element protection system, so you don’t have to worry about any risk of damage to your charged devices.
In our store, you will also find power banks from other manufacturers such as Baseus, Joyroom, Puro or Tech-Protect. We invite you to our rich and diverse offer of portable batteries, available in our online store HERE.
Remember that the choice of a power bank depends primarily on your individual needs, namely what extras you want it to be equipped with, starting from capacity, speed, weight, or price.
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