We've featured a slew of solar chargers on the Reserve in the past. Instead of relying on the sunlight when you're out on the lam, check out the eStream Water Power Generator. You just set the little turbine in a stream, and about 4-5 hours later you've got 6,500mAh of juice, which can charge up to 3 smartphones or tablets.
Not only that, but the eStream charges at a rate twice as fast as your normal outlet. The eStream also comes with a dome that you can use as a lantern above ground and underwater. It's a pretty nifty little outfit.
eStream is on Kickstarter right now, and his hit the pledged goal and then some. You can get early bird pricing at $180 with a pledge there.