Hydrogen fuel cell stacks have been produced commercially since the 1960s, mainly for military and space exploration tasks. Handmade, delicate and expensive, the mass production problem has been a major inhibitor to the widespread adoption of fuel cells as a mass-market power source. U.K.-based Bramble Energy has developed a manufacturing technique for hydrogen fuel cell stacks that uses an existing and well-optimized technology in the electronics industry: printed circuit manufacturing. 

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