MMC's HyDrone 1550 Successfully Tested on Yulong Snow Mountain SHENZHEN, China, April 17, 2017 /PRNewswire/ - Search and rescue is a major humanitarian use for drones, but mountain rescues at high altitude have been largely impossible due to the technology barriers created by the use of lithium batteries. Commercial drone manufacturer MMC has successfully smashed ... Czytaj dalej Passing the Highest Test: Hydrogen Drone Smashes the High Altitude Barrier for Drone Rescue