Green House announced a plan to introduce GH-LED10WBW, an LED lantern that generates electricity with water and salt, in mid-September 2012.
 
The lantern emits light when water and salt are put in the lantern, so it does not require a dry cell or rechargeable battery. It can continuously generate electricity for eight hours per charge of water.
 
To use the LED lantern, 350ml of saline water containing 16g of salt is made by using a dedicated water bag. When the saline water is put in the lantern, it functions as an electrolyte with a magnesium (Mg) rod (negative electrode) and a carbon rod (positive electrode) inside the lantern.
 
The luminous flux of the lantern is 55lm. The Mg rod can be used for up to 120 hours of power generation. The lantern can be reused by replacing the Mg rod, which is separately sold.
 
The generated electricity can be used not only for lighting the LED but for powering other USB-powered devices by using an accompanying USB cable. There is no manufacturer's suggested retail price.