It is difficult to get lights in emergency. Particularly, it is life-threatening at the time of a disaster. For such an unexpected situation, HITACHI MAXELL released LED lantern "MIZUSION" which emits light only with water and salt.
This has the magnesium alloy called the power-bar, this becomes negative electrode, oxygen becomes positive electrode, salt water becomes electrolye ,they generate electricity and an LED light emit light. The usage is easy and only pours salt and water into the lantern. The illumination of the LED light is 2,000 luxes and it's available for continuously lighting about 80 hours. Because we can use this repeatedly by changing power-bar, we can utilize this in not only the emergency but also the outdoor leisure. The size is 95mm x 215mm x 95mm and weight is about 350g. The price is 3,218yen(in tax).