This drone flies for 48 hours straight

The U.S. Naval Research Laboratory (NRL) recently managed to fly a fuel-cell powered Ion Tiger UAV for 48 hours and 1 minute using liquid hydrogen fuel in a new, NRL-developed, cryogenic fuel storage tank and delivery system.

Military tests fuel-cell backup power systems

U.S. military bases are required to keep functioning even if there’s a power failure, so typically they have backup systems that run on diesel. 

Intel backs portable fuel cell charger

Lilliputian System’s portable fuel-cell charger - about the size of a deck of cards and intended to power up small electronics like cells phones and iPods - now appears closer to reality.