Well , we ’re start close . CIT has manufacture a push button - sized propane burning fuel cell that can power MP3 player and “ flying robots . ” While I suspect medicative Mary Jane had something to do with that last possible execution , the conception is astounding . It ’s obviously going to take a few more years for this to hit the grocery store — what with the propane and all — but eventually they ’ll get it so you do n’t scorch your brow while charging your batteries .
Button - Battery Sized , Propane Fuel Cell for MP3 Players and Beyond[Treehugger ]
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