Not usb but mini UPS to keep your modem going is a common thing in India nowadays given constant power interruptions.
Ironically I got mine before I learned of the power cuts in my new home while building it. I was just merely thinking of edge cases of how a smart thief could undo my security cameras and figured cutting off the power would be one option I need to prepare, so got this UPS to backup both the modems (and redundant internet connections) and the home bridge for the battery backup security cam.
Ironically I got mine before I learned of the power cuts in my new home while building it. I was just merely thinking of edge cases of how a smart thief could undo my security cameras and figured cutting off the power would be one option I need to prepare, so got this UPS to backup both the modems (and redundant internet connections) and the home bridge for the battery backup security cam.