Power bank refers to a device that can directly charge mobile devices and has its own power storage unit. The main categories of the market include power banks specially configured for iPhone and multi-functional power banks. However, even if the iPhone is dedicated, the standard USB output is basically configured, which can basically meet the common mobile devices in the market: mobile phones, MP3, MP4, PDA, PSP, A variety of digital products such as Bluetooth headsets and digital cameras. The power bank produced by G'FIVE Kivu is also equipped with a USB data cable with a commonly used micro interface, which also has a charging function.

    The charging plug of the mobile power bank can directly charge mobile devices through AC power and has a battery storage device, which is equivalent to a hybrid of a charger and a backup battery. Compared with a backup power supply, it can simplify a charging plug device. Compared with the charger, it has its own power storage device, which can provide backup power for digital products when there is no direct power supply or when going out.

    The definition of mobile power bank is a large-capacity portable power supply that is convenient and easy to carry. It is a portable device integrating power storage, boosting, and charging management.

    The mobile power bank is also called "external battery", "backup battery", and "digital charging partner". It also has a very personalized name: "mobile phone partner". The concept of "mobile power" was developed with the popularity and rapid growth of digital products. Its role is to provide charging functions for mobile phones or digital products anytime and anywhere.

    The true meaning of mobile power charging treasures basically use polymer lithium batteries as power storage units. It itself is a lithium battery polymer power storage device. The voltage is regulated by an IC chip, and then the stored power can be released by connecting the power cord to charge or store electricity. Power banks are still relatively rare in the market. The spare battery is often referred to as a power bank.