Assertion: hydrogen powered fuel cell | /r/CapableOf | deliver up to 2 w of power
Facets:
value: for portable electronic devices
type: PURPOSE
Source sentences:
text: A small hydrogen powered fuel cell delivering up to 2 W of power for portable electronic devices can be bought for less than US$100; conversely it is possible to spend hundreds of thousands of dollars for a large multi-MW stationary power system.