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You can use it on a power bank. If you need to go where the network can be used, then you can apply for the operator's 4g network card, with the use of portable wifi devices, as long as the device has electricity, there is wifi network signal, such devices support the use of charging bank power supply. In addition, there are portable wifi devices with large-capacity batteries, which can also be used as a charging bank to charge mobile phones.
Can not, do not think that you can plug the usb port can be inserted at will, so it is easy to go wrong. Portable Wifi, I recommend you to use 360. Strong signal