This is really great accomplishment:-)
Montreal, Canada: EnergyOr Technologies Inc., a leading developer of advanced PEM fuel cell systems, recently demonstrated what are believed to be the world’s first fuel cell powered and longest ever duration multirotor VTOL UAV flights, flying for a record 2 hours, 12 minutes and 46 seconds.
I am not sure the actual battery on this quad.
Rated Net Output Power: 310 W
Max. Continuous Net Output Power: 370 W
Peak Net Output Power (Take-off): 1000 W
DC Output Voltage Range: 32 - 45V
System Efficiency @ 310 W: 54%
Design Lifetime: 1000 Hours
Net Energy Available @ 310 W: 1790 Wh