How can I charge my phone while hiking?

Sheri from Pomona, CA

Episode 1372 (2:16:49)

American Red Cross Clipray the crank-powered, clip-on flashlight and smartphone charger

Sheri wants a good battery backup that will last a long time and will enable her to recharge via solar. Leo says the problem with solar is that to be portable, it'll take days to charge because it would be so small. That's why Leo recommends crank chargers. They also have emergency radios built in. Campers also have camp stoves that will charge the phone by converting heat to electricity.