Haha, I’ll try to find a picture what will not scare people 
I’m always interested in those gadgets that helps extend technology to far unexpected places.
So far , my portable battery only workout is it to help my phone and ipad not die on long trip back to phillippines from China 
I did send one to my nephew who goes of field trips to the provinces. Hope his solar battery holds up
My father is old school. He has a 12V inverter which he uses with the car battery for those power outages that happens in the Philippines every year

I have heard of the GoTenna but have not seen it in use
I suppose you can use a mobile hotspot and use a wifi router as a repeater. My family has one of those mobile hot spots and its range only extends a few meters so you need something more powerful to amplify the Wifi