Keeping your portable devices charged when you are off the grid

How do you keep your portable gear charged when you're off the grid? What happens when the power outlets no longer work? What if there are no power outlets? Does everything have to grind to a halt as we revert back to banging the rocks together?
No.

Intel could make $200 touchscreen PCs a reality

To give the badly slumping PC market a much-need jolt, Intel is thinking about using one of the most effective tools in its arsenal: lowering chip prices.