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What is a power bank and how does it work?

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A power bank is a portable device designed to charge electronic gadgets (for example, smartphones, tablets, laptops) that support charging via a USB port.

Power banks are equipped with rechargeable batteries that can store electricity and release it when needed.

How does a power bank work?

The power bank consists of a battery and a controller enclosed in a metal or plastic case. Inside the device, the batteries are connected in a parallel circuit, which increases the overall capacity and stability of operation. On the side or end surface of the case there are connectors for connecting different gadgets, providing ease of use.

The controller controls the charging and discharging process of the battery, ensuring the safety and efficiency of the power bank. Additional elements, such as charge level indicators, LEDs and control buttons, help the user to control the status of the device and the charging process of connected gadgets. Working principle of power bank:

1. The power bank is charging. The device is connected to a power source (for example, via a network adapter or a computer’s USB port) to store electricity. The built-in controller controls the charging process, ensuring safety and preventing overheating or overcharging.

2. Energy storage. The charged power bank stores the accumulated energy in the built-in batteries. Battery capacity determines how many times the power bank can charge connected devices.

3. Transferring energy to devices. A charged power bank is paired with mobile devices or computers. USB connectors or other types of ports are used for connection. The converted electrical charges power the gadget, sent through the cable. At the end of the charging cycle, the device will automatically turn off or indicate a full charge with an indicator.

Connection to a wired device is carried out using a USB cable. The power bank controller regulates the power supply, providing the optimal current for the device being charged.

What is a power bank with wireless charging?

The wireless charging power bank is an advanced portable charger that allows you to charge your gadgets without the need for wires. In addition to standard USB connectors, these power banks are equipped with an induction coil that creates an electromagnetic field. Compatible devices that support wireless charging technology (for example, Qi standard) can be charged by simply being on top of the power bank.

The principle of operation of wireless charging is the transfer of energy through electromagnetic radiation. When the device is placed on top of the power bank, the induction coils of both devices create a magnetic field, thanks to which the energy is transferred from the power bank to the charging gadget. This provides convenience and flexibility, eliminating the need for cables and making it easy to charge on the go or anywhere else.

How does a solar panel power bank work?

A solar power bank is a portable charger that can be charged by sunlight, turning it into electrical energy. The built-in solar panel allows you to use a renewable energy source, which is especially useful in environments where there is no access to electrical outlets (for example, when camping or on long trips).

The principle of operation of power banks is based on the photovoltaic effect: solar panels convert light into electricity, which is then stored in built-in batteries. Devices are charged in the same way as conventional power banks, via USB ports or wirelessly. This makes power banks with solar panels convenient and environmental solutions for maintaining the operation of mobile devices in off-grid conditions.

Source: korrespondent

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