NiCd, NiMH and Li-Ion. Oh my

Discussion in 'General Survival and Preparedness' started by melbo, Jan 13, 2006.


  1. melbo

    melbo Hunter Gatherer Administrator Founding Member

    This is for Ghost and ghrit... Found while researching battery packs for a radio

    http://www.ka7oei.com/nicds.html
     
  2. ghrit

    ghrit Old, mean, and nasty Administrator Founding Member

    Hm. Research time. Something is off there.
     
  3. sniper-66

    sniper-66 Monkey+++ Moderator Emeritus Founding Member

    All I know is that we are forbidden to mix batteries like that in our ANVIS goggles. I believe it will overheat one of the batteries and start a fire!
     
  4. ghrit

    ghrit Old, mean, and nasty Administrator Founding Member

    I suspect that the different batteries are on different power supplies, one low draw for keeping warm, and the other fast draw to power up the transmitter. Not uncommon in some devices. In the case of the NV, I rather imagine that a single battery type is used, hence the prohibition on mixing. Dunno.
     
  5. melbo

    melbo Hunter Gatherer Administrator Founding Member

    The quote was just to get you to look at the article... pretty good read on all types of rechargables
     
  6. ghrit

    ghrit Old, mean, and nasty Administrator Founding Member

    I believe that easily. If you mix battery types in that type of device, one can push the other too hard. It is a matter of matching current carrying ability (actually internal resistance.) If one type can deliver faster than the other can pass thru, it will heat. Important to match them up. That is the same reason you should not mix fresh and used batts in one device.
     
  7. ghrit

    ghrit Old, mean, and nasty Administrator Founding Member

    OK. Read it in the hopes that he would have votage drop off curves. He didn't. However, he covered the need to know info well. [beer]
     
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