E-Dina, a Colombian renewable energy start-up has developed a cordless light which can converts salt water into electricity as a more reliable alternative to solar lamps in off-grid communities. WaterLight is developed by E-Dina and Wunderman Thompson
How it works
The WaterLight(The portable device they developed),needs to be filled with 500 millilitres of seawater to emit up to 45 days of light.Under emergency condition you can use urine.WaterLight works 24 hours a day through ionisation, which sees electrolytes in the saline liquid react with magnesium and copper plates on the interior of the lamp to produce electricity.
This device can also be used to charge a mobile phone. The WaterLight features a tubular wooden case.
The WaterLight is created in collaboration with the Colombian division of creative agency Wunderman Thompson, the project was designed as a stand-in for solar energy, which is often used to supply remote locations but which is weather-dependant.
WaterLight can be more efficient than solar energy lanterns because it regenerates instantly.
Once filled with water, the energy delivery is immediate . One light can provide around 5,600 hours of energy, which equates to two to three years of use depending on how often it is needed.
Although this is a long-established process, E-Dina has developed a way to sustain the chemical reaction over a prolonged period of time so that it can be used to power a light source.
After the salt particles have evaporated, the lamp can be emptied and refilled while the used water can be repurposed for washing or cleaning.