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Ni-Cad battery advice

Discussion in 'Electronic Repair' started by WbSearch, Aug 26, 2003.

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  1. WbSearch

    WbSearch Guest

    Just bought some new D Ni-Cad's and one is at 0 volts, others about 1.088. The
    supplier suggests a quick charge on the dead one becasue it is in a "sleep
    mode". My understanding is Ni-Cads should never go to 0, unless totally
    discharged by a load, and that's not a good idea either. Is the battery OK to
    charge and use? Thanks in advance.
     
  2. | Just bought some new D Ni-Cad's and one is at 0 volts, others about 1.088. The
    | supplier suggests a quick charge on the dead one becasue it is in a "sleep
    | mode". My understanding is Ni-Cads should never go to 0, unless totally
    | discharged by a load, and that's not a good idea either. Is the battery OK to
    | charge and use?
    |

    Possibly, try charging it.

    I have never heard of a 'sleep mode', it is either very discharged or
    perhaps internally shorted.
    --
    Regards,
    Harry (M1BYT)...

    Remove the 'NOSPAM' in my email address to reply.

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  3. Jerry G.

    Jerry G. Guest

    Tell him to exchange the battery, because it is dead, and you cannot
    recover it. Also, once these are dead like this, they never really get
    back to normal.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    ==============================================
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    ==============================================
    Just bought some new D Ni-Cad's and one is at 0 volts, others about
    1.088. The
    supplier suggests a quick charge on the dead one becasue it is in a
    "sleep
    mode". My understanding is Ni-Cads should never go to 0, unless totally
    discharged by a load, and that's not a good idea either. Is the battery
    OK to
    charge and use? Thanks in advance.
     
  4. mike

    mike Guest

    A NiCd at zero volts is not necessarily bad, but one that is NOT at zero
    is more likely to be good. The only reason for a NiCd to be at zero is
    cause it has internal leakage "excessive self discharge", or has been
    stored for a very long time. Neither is to your benefit.
    I'd send it back, not worth the risk. After you mess around with it for
    a month and decide it's leaky, it's too late.
    mike
    --
    Bunch of stuff For Sale and Wanted at the link below.
    laptops and parts
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  5. Dave D

    Dave D Guest

    That sounds like rip-off merchant speak for 'this cell is knackered,
    cher-ching'

    My understanding is Ni-Cads should never go to 0, unless totally

    Take it back and get a replacement, some chargers will refuse to charge a 0v
    cell as it will appear as a dead short. You may be able to stuff some
    current through it from a bench psu to get it going prior to charging, but
    why should you have to?

    Dave
     
  6. WbSearch

    WbSearch Guest

    Thanks for the reply. I spoke to the salesman at Mega Batteries and he is
    sending a replacement, no hassle at all.
     
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