With the popularity for micro-drones booming across all sorts of applications from everyday consumers to event reporting to security to logistics (the list goes on), you can see why some experts have valued the market at an estimated $5 billion-plus by 2020. Very few drones offer more than 20 minutes battery life, so to achieve more than 3 hours flight time is no easy feat. As fuel cell systems become more developed and cheaper, the drone market is seen as a promising area for deployment as problems over battery life, currently a major consumer pain point, can be immediately overcome.