WaterLight: A Portable Lamp That Uses Saltwater To Recharge
May 3, 2021 Share
According to World Health Organization data, nearly a billion people have no access to electricity. That means 14% of the global population has no light for half of the day, stopping people from working. To solve this problem, two companies developed a light that can recharge without relying on a power grid.
WaterLight is a portable, low-cost LED lamp that uses saltwater to recharge its batteries. It was designed for communities with little to no electricity access. The innovative device doesn’t require a power outlet to charge because it uses a water-activated magnesium battery that causes a reaction when in contact with brine (salty water). Ocean water, plain water with salt added, or even urine can be used in emergency cases when the first two are not available.