This problem is not difficult depending on whether it has a mobile phone port and a computer USB port. These two interfaces have access ports on the power bank, which means that the discharge and charging are connected. But how to use the power bank correctly and how to make the life of the power bank longer requires us to pay attention to some problems.

    The power supply usually has 4 indicator lights, and each indicator represents 25% power. The indicator light will flash when charging. If the first indicator light flashes during charging, it means that the battery is charging 0-25%, and the second indicator light flashes. It means that it is charging 25-50% of the power, and so on. When the 4-segment indicator lights are all on and no longer flashes, it means that the power bank has been charged.

    Use computer to charge: connect the computer USB and power bank with the charging data cable to start charging; All power bank products have buttons under the indicator light. The buttons generally have two functions:

    1. Check the remaining power of the power bank supply press the button below the indicator light to turn on the indicator light. If only one indicator light is on, it means that the power bank has about 0-25% power remaining, and the two indicator lights are on to represent the remaining 25-50% power, and so on. Press it again and the indicator will automatically turn off after 2 seconds.

    2. Turn on the power bank with LED flashlight Long press the button under the indicator for 2 seconds, the LED indicator will turn on. When the LED light is on, press and hold for 2 seconds to turn off the flashlight. The power bank supply charges the electronic device, check the remaining power of the power bank supply, if it is not insufficient, you should first charge the power bank supply; Choose the corresponding adapter for the type, brand and model of the mobile terminal equipment used. 

    Connect the adapter to the transmission line, and use the transmission line to connect the power bank supply and the mobile terminal. Since the power bank supply adopts self-recognition and plug-and-play technology, it will automatically charge when connected. It's just that some old mobile terminals cannot realize self-recognition due to the outdated hardware and software. 

    You need to press the button under the indicator light to realize charging. The battery indicator will automatically turn on to show the remaining battery power and charging status of the power bank supply, which also indicates normal charging.