So you are worried about getting stuck outdoors with no light or any way to charge your phone? The HydraCell Power Cube has you covered. It is an emergency charger that lets you use saltwater to power your devices. It is eco-friendly and has a water-activated fuel cell to get the job done.
A set of charging plates can charge your phone up to 10 times. It can also light a mini emergency light for up to 75 hours. The device is made of recyclable plastic and also produces biodegradable waste.