I live out of a backpack for half the year. Since room in my pack and time in civilization is scarce, I require efficient gear that travels well.
Power banks and AC adapters have been a staple in my tool chest for years. While many are packable, they don't provide the oomph my laptop, phone, or camera batteries require to stay powered up. Breaking camp to juice up batteries is a luxury I can't afford.
Full story from the WindowsCentral blog...