A power supply is a device that provides electrical energy to a device, machine, or other electronic product. A power supply can be a power supply built into a device or an external power supply. An external power supply is a standalone power supply device, usually connected to the power input of a device, that provides a stable power supply to the device.
The external power supply can provide continuous power to other devices or machines, which is important for those devices that need stable power support. For example, terminal equipment in industries such as medical equipment, bank ATMs, and aviation all require stable power output. In addition, devices that provide power to the outside also facilitate the connection between electronic devices, which is convenient for people's daily life and office work.
Providing power to the outside is generally used in the following scenarios: chargers that provide mobile charging functions, such as cell phone chargers; external power adapters, such as laptop power adapters; power distributors, such as electrical outlets, UPS power supplies, etc.; and portable power supplies, such as mobile power supplies and solar chargers. These devices can meet the needs of people to obtain electricity in various ways, and guarantee the normal operation of electronic equipment in different occasions.