A power bank is a portable power device that can provide additional power for electronic products such as mobile phones, tablets, laptops, etc. The principle of power bank is to use rechargeable batteries such as lithium batteries or nickel-metal hydride batteries to store electric energy, and then output current to the equipment that needs to be charged through USB ports or other interfaces. The capacity of the power bank is generally expressed in milliampere-hours (mAh), and the larger the capacity, the more times it can be charged.
If you want to use the power bank, you must first fully charge the power bank itself. There are several charging methods for power banks:
This is the most common and fastest method of charging. In general, the power bank will be equipped with a USB cable and a charging head. You only need to plug one end of the data cable into the input interface of the power bank, and the other end into the charging head, and then plug the charging head into the wall socket to start charging. The input interface of the power bank is generally a micro USB interface, a Type-C interface or a lightning interface, and the appropriate data cable should be selected according to the model of the power bank. When the power bank is charging, there will generally be LED lights to display the current power, and when all the LED lights are on, it means that the charging is complete. After the charging is completed, unplug it in time to avoid overcharging affecting the life of the power bank.
If you don't have a wall socket nearby, you can also use a computer to charge the power bank. You only need to plug one end of the data cable into the input port of the power bank, and the other end into the USB port of the computer, and you can start charging. However, charging with a computer will be slower than using a wall socket, as the USB port of the computer generally outputs less current than the charging head. When the power bank is charging, there will also be LED lights to display the current power, and when all the LED lights are on, it means that the charging is complete. After the charging is completed, unplug the data cable in time to avoid occupying the computer's power.
It is an environmentally friendly and geographically independent method of charging. Some power banks have the function of solar charging, and they will have solar panels on their surface, which can convert sunlight into electricity and store it in batteries. With solar-charged power banks, you only need to place them in a sunny place and they will be charged automatically. However, charging with solar power is much slower than charging with a mains and is affected by the weather and season. When the power bank is charging, there will also be LED lights to display the current power, and when all the LED lights are on, it means that the charging is complete. After the charging is completed, the power bank should be put away in time to avoid overheating or moisture affecting the performance of the power bank.