The 2200 mah charging bank can support the use of portable WiFi for about 3-5 hours, and the specific use time depends on the specific use. If you are watching videos online for a long time or doing intensive data transfer, you may reduce the use time, and if you are simply browsing the web or sending and receiving email, the use time may be longer. In addition, it is also necessary to pay attention to the quality and use of the charging treasure, and reasonable use and proper storage can extend the service life.