January 19 marked the first flight by a Raptor UAS drone using pelletized hydrogen to power a fuel cell that generates electricity and makes the propeller turn. Energy Pellets Cella Energy, a Scottish-based enterprise, is now producing small quantities of their little green beads (just in time for Mardi Gras), filled with solid-state hydrogen. Claimed to have “two or three times” the energy per weight of the best of lithium-ion batteries, Cella’s pellets are designed to enable low-pressure transportation of hydrogen in a form that allows fueling to take place with a bit of magic sleight of hand. Looking like miniature green dumplings, Cella’s mix of plastic and encapsulated hydrogen has the advantage of using existing infrastructure, “with minimal alterations.” Think of the pellets as a dumpling with a hydrogen filling which can be repeatedly extracted and refilled. How many refillings is not stated at this time. Recycled Energy The pellets release their hydrogen into a fuel cell when they are …