Some people do not charge to borrow the power bank. That is because it is completely free when using the shared charging bank for the first time, and it will be charged according to the specified price when using it later. Some businesses also provide free emergency charging, but the time is slightly shorter. Power banks are generally placed in large shopping malls and transportation hubs. In this mode, people and power banks can be moved.
With the power bank show the balance is zero, it is said that you need to recharge to use, this is a platform of software, then if you want to use it can also borrow a friend, you can also buy one.