Getting stuck without power is not ideal. With a decent solar charger, you will be able to get your smartphone and other devices going. When the weather doesn’t cooperate, you can use a hand crank charger to generate your own power. The K-Tor Pocket Socket 2 is a neat hand crank charger that lets you do just that. It comes with an outlet that you can use to attach your lights, chargers, and everything in between.
This 10w 120v DC generator can light up a small bulb at 2 revs per second. It is a good workout too.