What are the functions of portable power bank

Portable power banks are usually designed to be lightweight, compact, and easy to carry for mobile use, and some even come with a video stand. After the charger fully charges the mobile power supply (usually designed to take 3-5 hours to fully charge), connect your digital device with a suitable connector or directly connect it with a USB cable for charging.
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When using mobile power products, you need to pay attention to several issues:
a. The output voltage of the mobile power supply must be within the range of 5.3V±0.5V, otherwise it cannot charge certain brands of mobile phones;
b. The transfer connector must match. The principle of use of mobile power products is to charge digital devices through a USB cable. One end of the cable with a USB interface is connected to the mobile power product, and the other end is connected to the digital device, so the interface at the other end is It must be consistent with the interface of the digital device, otherwise it cannot be charged.
c. The mobile power supply should be handled in a dry environment. Rain, moisture, and various liquids or moisture can corrode electronic components and wiring.
d. Mobile power supplies cannot be stored in high temperature places. High temperatures will shorten the life of electronic devices, damage batteries, and degrade some plastics.
e. Do not throw or knock the mobile power supply in a rough manner. Rough use may damage the internal circuit boards and precision machinery.