A Swedish company has invented a charger for mobile phones, cameras and GPS devices that can power-up your electronic gadgets with little more than water.
The PowerTrekk has been designed for people who 'who spend time away from the electricity grid' and do not have access to conventional power in remote locations.
The charger needs just a tablespoon of water to produce around 10 hours of phone battery life.
It works via a chemical reaction. The water reacts with PowerTrekk's special ingredient, sodium silicide, to produce hydrogen gas.
Sodium silicide is a new chemical powder that has been developed by 'green' energy company SiGNa Chemistry, based in New York. PowerTrekk is the first commercial product that has used sodium silicide.
The invention works with any device that has a USB port and with almost any type of water, including salt water. It can even run on puddle water providing it isn't thickened with mud or any other sediment.
The product was first glimpsed last year at the Mobile World Congress in Barcelona, but a modified version of the technology has been on show at Consumer Electronics Show (CES) in Las Vegas.