Claiming to have developed “the most energy dense power solution for electric bicycles,” SiGNa Chemistry, Inc., is hoping to greatly improve not only electric bicycles, but many other electric applications. The New York City-based company has developed a cartridge containing sodium silicide, a stable metal powder. When the powder comes in contact with water (including polluted water, sea water, and urine), it instantly produces hydrogen, and the hydrogen is then converted into electricity. According to the company, one cartridge can power a bicycle for a range of up to 60 miles without pedaling.