There might not be anything worse than being stuck in an ultra remote location with walkie-talkie in hand and no battery juice left to power one last call for help. Enter the dual powered hand crank two way radios. On the back of each radio is a crank. Just 5 seconds of cranking will get you 15 minutes of juice. Genius. They’ve got endless channels, and an 18 mile range.
Available here for $60