I am sorry, but i do not know anything about fuel cells, other than they would help emmisions in cars. However, what got my attention was this...
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I also am hoping to build one able to power my laptops off of for use a comps.
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Like i said before, i do not know much about fuel cells, but, i do know one thing. Having hydrogen gas in a FIRST competition could cause serious problems. I understand you would want to find something to power your laptops off of, but something involving hydrogen seems to me like disaster. I may be wrong, but it just seems dangerous to me. But, i do have a solution for powering your laptops at competition. If you purchase a UPS (Uninteruptibale Power Supply, that is if you don't already have one) you could use that. I know that some of the newer ones are able to be turned on without being connected to a wall outlet. They are somewhat lightweight (depending on what size you get) and they can power your computer all day, if you have one that has enough power. Since they are normally used for desktops, i have tried one out to test the time it can run a laptop, and i got tired after five hours, so i turned it off. They even charge automatically when connected to a wall, so it can be used as a portable power supply.