Introduction to mobile power

Mobile power, mobile charger (power bank, mobile charger, power bank, urine bag, nanny; English: Power bank) is a portable charger that can be carried by an individual and can store electricity. It is mainly used to charge consumer electronic products such as handheld mobile devices (such as wireless phones and laptops), especially in places where there is no external power supply. Its main components include: batteries for energy storage, circuits for stabilizing output voltage (DC-DC converter), and most mobile power supplies come with chargers to charge built-in batteries.
The emergence of mobile power was originally to charge consumer electronic products in places where there is no external power supply, but because its output interface is a highly universal USB interface, it is also used to power other devices or equipment that use USB interfaces as power input terminals, such as USB LED lights, USB electric fans, etc.