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Discussion in 'General Electronics Discussion' started by cjdelphi, Jul 31, 2015.

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  1. cjdelphi

    cjdelphi

    1,096
    104
    Oct 26, 2011
    SALt - It's a Social Movement

    before you go look, it's a startup offering power led lamps even charge a phone? from saltwater (either homemade or directly from sea water) claims to give 8hours runtime ...

    http://www.salt.ph/

    imo, you'd have to have 2 different metals using saltwater as the electrolyte ...

    but, if it did use that method, the metals would corrode...?
     
  2. Miguel Lopez

    Miguel Lopez

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    Jan 25, 2012
    I have tried that using a lemon, and a couple of diferent metal wires (iron and copper, in my case). It works for a very short period of time (few seconds), but to power a white LED you would need about 3V, so a single cell won't work. I think that require at least 2 cells in series. A phone charger requires 5V at least (I guess).

    To increase the power it would need a very high area on the plates, so I think that lamp would require several plates arranged as a common battery does, and yes, surely the plates will corrode. As an emergency solution it could work but it will require a very fine work to be build.
     
  3. cjdelphi

    cjdelphi

    1,096
    104
    Oct 26, 2011
    If that's the case, then it's claims of reuse might be a but exaggerated but they're offering to the Philippines where there is no power (which would imply reusable a one or two use device would not go down well...)

    maybe it's not that at all.... curious
     
  4. hevans1944

    hevans1944 Hop - AC8NS

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    2,122
    Jun 21, 2012
    This, or a similar company, has had a corner booth in a high-traffic aisle at the Dayton Hamvention® for at least two years in a row now, touting this "salt water battery system" as an emergency backup power source. I don't think they had many takers who "bought in" to their product, although hams generally are always looking for inexpensive alternative power sources. Solar cell panels always sell well at Hamvention®, both at vendor booths and in the outdoor flea market. Salt water batteries? Not so much.
     
  5. duke37

    duke37

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    Jan 9, 2011
    The energy which the battery supplies comes from the energy stored in the electrodes. They will be consumed during use and maybe corrode when not in use.

    I do not think the specific electrolyte is not important.
     
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