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In today's world, we depend to one degree or another on the availability of electricity. With the development of electronic technologies and the Internet, we need to be constantly in touch. Modern gadgets are portable and mobile and require external power from time to time for charging. External portable energy storage devices - power banks - come to the rescue.
What is a power bank?
The power bank is a powerful accumulator of electric energy, which is used to charge and maintain the autonomous operation of various mobile devices: smartphones, laptops, tablets, etc. This is actually a laptop or smartphone battery made in a separate case. Several power elements are placed inside the housing of the power bank, which are controlled by the controller board. The power bank is equipped with connectors for connecting various gadgets - USB, MicroUSB ports, usually of types B and C. Outwardly, the power bank looks like a bar, but some models contain bright and unusual design solutions.
By purpose, the following types of power banks are distinguished:
• For a laptop. These are massive portable batteries with a capacity of 15 to 60 thousand mAh and a voltage of at least 12V (most laptops are powered by 19-20V). They come in handy for charging a laptop on the road or on a trip.
• For a tablet. Universal mobile batteries. Suitable for charging not only tablets, but also smartphones, smart watches, bracelets. They have average power, are produced in a standard and bright design.
• For a phone (For a smartphone). As a power bank for a smartphone, UMB and one more type can be used - a battery cover. Such a device not only charges, but also protects against falls. The principle of operation of these wireless external batteries is quite simple: they are charged from the network, and the internal elements store the charge for a long time and give it to the connected device as needed.
According to the type of battery, the following types of power banks are distinguished:
• Lithium-ion (Li-Ion). The most common and cheapest. They have a small self-discharge, quite a lot of weight and provide the current levels required for most gadgets. Designed for 500-1000 charging cycles. The disadvantage is a high probability of failure due to overheating. The consistency of the electrolyte is gel-like.
• Lithium-polymer (Li-Polymer). It is an improved version of lithium-ion batteries. They weigh little and have protection against overheating. Their electrolyte consistency is liquid
• Power banks with a solar battery. These devices can additionally be charged from solar energy.
Classification by case material:
• Plastic. They are produced in various shapes and colors and are characterized by light weight and small sizes. Different designs can be applied to plastic devices to diversify the design. Among the defects, fragility is distinguished, since plastic cases are less resistant to damage and scratches than metal ones.
• Metal. Aluminum is used for production. Metal power banks are heavier and more expensive than plastic ones due to their resistance to shocks, falls, and scratches.
• Protected banks. Batteries of this type are waterproof, protected from shocks, damage and breakage, a special coating protects against moisture, dampness, temperature changes - extreme heat or frost.
Classification by indicator type:
• With LED indicator. The housing of the power bank is equipped with LEDs that show the charge level. This indicator is approximate, but gives the user an understanding of the state of charge/discharge.
• LCD display. This screen displays accurate information about the state of charge/discharge, as well as data about the status of USB ports.
Classification by the number of ports:
• One USB connector for 1A. They are suitable for small equipment and are produced with a small power.
• One 2A USB connector. More powerful modifications. Suitable for cameras, laptops and other devices. Quite often, manufacturers combine connectors 1A and 2A, allowing the user to charge two gadgets at the same time.
How to choose a bank?
If you decide to buy an inexpensive power bank, ELVIS managers will help you choose a device compatible with your equipment and in accordance with your wishes and capabilities. Our catalog presents a sufficient number of models with fast delivery in Kyiv and Ukraine. Information and instructions on technical characteristics, photos of models are placed on each product page. As a rule, we provide a discount from the declared price.
Before purchasing a power bank, it is recommended to consider the following points:
• Compatibility with your device. Before buying, you should pay attention to ensure that the output voltage of the power bank matches the input voltage of your device. You can check this indicator on the charging unit or in the instructions. The most common voltage in almost all smartphones or tablets is 5V DC.
• Amperage. An important parameter, how quickly your device will be charged from the power bank depends on it. If the power bank has less current than is required to charge a smartphone or other device, then the power bank will charge it slowly or will not be able to initialize the charging process at all.
• The capacity of the bank. This parameter determines how much and for how long the power bank will provide energy to your device. It affects dimensions and dimensions. Our catalog includes models with the following capacity:
o At 5000 mAh. The cheapest and most compact models. To support autonomous operation of one device.
o At 10,000 mA·h. Average sizes. To support autonomous operation of one device.
o At 20,000 mAh. Average indicator. A power bank with this capacity is enough for long periods of autonomous operation.
o At 50,000 mAh. Large power banks for several devices and long periods of autonomous work.
• Additional options: For convenience, the power banks are equipped with the following options:
o Two USB connectors. Allows you to charge two devices at the same time.
o LED lighting. Simplifies the process of finding a power bank in the dark.
o Flashlight. You can highlight.
• Appearance. Since the power bank can serve as an image element, users can pay attention and choose devices with appropriate design solutions.