There is a huge group of hams dedicated to low power portable ops who reject the "ham shack" mentality of using heavy, high-powered equipment that tethers you to a building and dedicated power supply. How far with how little is the quest of portable ops, nicknamed "QRP". They use 5 watts or less and only the equipment they can carry.
Lots of online videos of portable stations set up in the middle of nowhere, wire thrown up into a tree, making contacts hundreds or thousands of miles away using battery power. It's quite impressive.
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