Powerless filtration system increases fuel cell efficiency

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tekdroid @ Apr 28th 2007 3:46PM

dunno about the practicality of outfitting an increasingly small audio device with solar cells (unless of course really efficient cells come out), but I would like to see easily replaceable batteries a la mobile phones. The spare can be charged any way you like it. Solar, mains, USB, whatever. Embedded batteries are silly.

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