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Hydrogen batteries are a combination of a hydrogen fuel cell power module and an energy module to supply and store the hydrogen. Hydrogen batteries can be fueled up with extra hydrogen at any time to increase their range and have a higher energy density than traditional batteries. Hydrogen fuel cell systems producer Protonex utilises hydrogen batteries to provide high-performance, low-cost fuel cells for portable and remote applications requiring 10 to 500 watts of power.

Protonex, an advanced fuel cell power systems provider to the US military, will be unveiling it's new fuel cell system in an upcoming meeting for the Association of Unmanned Vehicle Systems International (AUVSI).