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Some routers, if the power adapter is 9V or below, can be powered directly to the wireless router with a charging bank, and only a USB to DC line is required.
If it is higher than 9V, that is, 12V wifi, you can buy a booster line, so that the charging bank can supply power to the wifi. If you are afraid of trouble, you can buy a special power supply for the wireless router, called \"night tour treasure\"