• The FAA has reviewed Skai and authorized flight testing
• What sets the Skai apart is its power source: Hydrogen fuel cells
• “It’s the cleanest form of energy available on the planet”
• Fuel cells have much greater energy density than batteries
• That allows for a reduction in weight without sacrificing operating range
• The Skai’s fuel cells are also 99% recyclable
• No rare-earth metals found in lithium-ion batteries
• They have a decades-long lifespan
• Refueling is also quicker than recharging a battery pack, at under 10 minutes.

https://www.digitaltrends.com/cars/alakai-technologies-skai-evtol-hydrogen-fuel-cell-flying-car/#/1