Here is a handy tool that can get you out of trouble outdoors. The LightStick is a rugged, portable lighting solution that can also serve as a power bank for your smartphone. It is waterproof to 6 feet and offers you up to 46 hours of lighting on one charge. There is a 5200 mAh battery that charges up to 3 smartphones.
The LightStick has 3 brightness levels and emergency flashing. It is dirt proof, snow proof, shockproof, and waterproof.[where to get it]