This hiking gadget will allow you to charge any smartphone away from civilization, and therefore it can become the most reliable assistant for avid travelers and lovers of solitude in nature for several days or even weeks. The device generates energy for a discharged battery from the fire of a bonfire or a tourist burner using the thermoelectric effect. The folding FlameStower design includes a small liquid tank and a metal plate placed above the flame. The temperature difference generates an electric current, the output power of which is comparable to the USB port of a laptop. 20 minutes of charging will provide 40 minutes of talk time. The time to fully restore the battery depends on the temperature of the fire and the smartphone itself. FlameStower weighs 283.5 grams, its parameters are 197x57x25mm, the capacity of the water tank is 140 ml. The cost of a hiking gadget is $ 99.