Serious mobility requires serious power. Life is complicated enough for mobile professionals without having to desperately search high and low for outlets. Then again, not everyone minds. Some people have developed elaborate personal systems for getting a charge. We call these people “Wallhuggers,” and you just might have had an awkward encounter with one at an airport, coffee shop, or work conference. We’ve built a guide to the eight different kinds of Wallhuggers, and their corresponding level of “outletiquette.”