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Checking power drill battery charger?

Discussion in 'Electronic Basics' started by TheKeith, Dec 28, 2003.

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  1. TheKeith

    TheKeith Guest

    I just got a new 15.6 V craftsman drill and noticed that when charging the
    nicd batteries, the do *not* get warm at all, but in the instructions, it
    says the batteries do get warm. They seem to be charged, but then they
    already had juice in them when I charged them for the first time, so I'm not
    completely sure the batteries are charging. Is there a way I can check the
    charger? I have a multimeter, if that helps. Thanks.
  2. Ross Mac

    Ross Mac Guest

    Use the drill till the batteries run down (find an old board and drive some
    big screws into it, that should help), then try to charge them. They should
    warm up. If the charger isn't working you will know in short order.....The
    drill won't work anymore!
  3. TheKeith

    TheKeith Guest

    that's what I ended up doing. The charger works fine. I was just wondering
    if there was another way where I didn't have to do that, but no matter now.
  4. ------------------
    The danger on Usenet is that someone who knows won't post.

    NiCd's WILL NOT heat up UNLESS they are being DANGEROUSLY OVERCHARGED!
    The charger should prevent this, so be glad that it IS NOT HAPPENING!

  5. TheKeith

    TheKeith Guest

    Hey thanks for the info. I appreciate it.
  6. Ross Mac

    Ross Mac Guest

    Heat up is a rather relative word...I can say that "every" battery I have
    ever charged exhibited some level of warming. Even the directions that came
    with the drill said they may warm up at some level....You should explain to
    me how current flows and no heat is generated....Not trying to flame you
    here....just would like some more specifics on your claim.....take care,
  7. Ross Mac

    Ross Mac Guest

    Since the above post claims that NiCd battteries don't get warm on
    Check this link !
    You will find that the charging temperature of a NiCd battery is from 0-45C
    or 0-113F. Where I come from 113 F IS warm........
    As far as the most common rechargeable batteries go, NiCd seem to fall in
    the middle as far as recharge temperatures are concerned.

    I guess, I can't argue about the part of the post that states

    " The danger on Usenet is that someone who knows won't post "

    This guy made that point rather well!!!...........Ross
    NO, that isn't *warm* at all. That's not even one-potato hot! The
    fact is that secondary cells do *not* get *warm* when properly
    charged. The charger will disconnect if/when they do (it's the
    most reliable signal that the chemistry is "done").
    Ok, they still don't get "warm", during charge.
    Well Ross, RSW is right here. ...go figgr; a clock stopped!
  9. Ross Mac

    Ross Mac Guest

    So you don't think that a battery that is over a hundred degrees is warm???
    I never said they would burn your fingers...just that they would be warm...
    That is opposed to being cool when you install them in the charger....
    Oh well....a post on relativity......I guess I pissed everyone off
    Considering that the normal human body is just a few degrees
    cooler than that, not particularly, no.
    Pissed off? A disagreement is hardly getting PO'd.
  11. Ross Mac

    Ross Mac Guest

    Not too eloquent of me huh....Guess I need a mood enhancement....Well, since
    it's in the holiday tradition, think I'll have a cold one!
    Happy New Year Keith!.........Ross
  12. als

    als Guest

    More likely, that someone who does not, will. :)
  13. ND

    ND Guest

    Take the battery pack off the charger and put it in the drill. Lock the
    drill switch on and let it run until the pack is completely dead.
    Nicads work best if completely discharged before being recharged. You will
    also find out how well your charger is working. You may or may not have
    heard of Nicad battery memory. You can research it for details, but just
    keep in mind charging a partially discharged battery pack over time leads to
    less of a full charge.
    Best to completely discharge and then complete recharge (depending on what
    the instructions for your drill recommend).
  14. CBarn24050

    CBarn24050 Guest

    Hi, my understanding was that nicads last better if stored discharged, is that
    not correct?
  15. Ian Stirling

    Ian Stirling Guest

    Never, ever do this.
    By discharging the pack completely to zero (as this will do in many drills)
    this guarantees reverse charging one or more cells, as all the cells will
    not be matched perfectly.
    This is about the worst thing you can do to NiCd/NiMH and will severely shorten
    the life.
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