A large toolbox placed on a wooden floor. From the toolbox a cable goes to a white box, the box has "12V -> 9V" written on it. From the box another cable goes to a TP-Link LTE Modem. The modem is turned on, using power from the battery hidden in the toolbox.
https://cdn.fosstodon.org/media_attachments/files/111/199/180/747/565/220/original/2ba8e52f1d45de86.jpg