There’s a new LED dive light on the horizon, and this one has one very unique feature: it runs on saltwater.

The SWES (Sea Water Energy System) Technology SDL-600 Dive Light contains an energy cell comprising of an anode and a cathode precisely spaced apart. When an electrolyte liquid (salt water) surrounds the two elements, an electrical current is produced to power the single CREE XM-L2 light, producing approximately 600 lumens of light. Since it is powered by salt water, it never needs batteries or recharging and will continue to run for more than 2,000 hours.


A demo of the SWES light submerged in a salt water tank, with its rear cover removed.

The SDL-600 light is not just a concept, it’s a working dive light that will hit the market in 2017. Aside from producing light without a battery, the light also has several other features divers may like.

The light is…light. Weighing in at just 702 grams, the light is made of durable ABS plastic and has a maximum depth rating of 100 meters. With very simple construction, it has no moving parts and requires no maintenance, aside from a quick rinse with fresh water after diving.

More information on the SWES SDL-600 Dive Light can be found on the SWES website here. There is no specific release date or price available yet.