The power bank is a portable mobile power supply, when the mobile phone and other devices are short of power, and there is no AC power available nearby, used to charge it to solve the emergency need. There is no technical connection between the charging bank and the wireless router. Of course, if the electrical parameters match, it is also feasible to use as a power supply to power some portable routers. But that's not the same thing as retrofitting a wireless router.
Your mobile power supply is the charging treasure wifi, which can charge the mobile phone, but also can be inserted into the traffic card when the wifi network card is used. Both can run simultaneously. But the data card is to buy, but there is a package and package data plan.