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Discussion in 'Electronic Basics' started by mowhoong, Mar 24, 2005.

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  1. mowhoong

    mowhoong Guest

    When ever i buy a new wall c'lock the seller mentioned don't use
    alkaline battery
    just use a nomal battery other wise it will damage the c'lock.Can any
    person know why ?
    Thanks !
  2. Lord Garth

    Lord Garth Guest

    Sounds like bunk to me. Are carbon / zinc "normal" batteries still
  3. Alkaline batteries are known for their capability to give pretty much
    current in a short time. That's one of the reasons, commercials for that
    kind of batteries always show moving ojects that use pretty much current. If
    you require very little current during a long time, the alkaline is not the
    battery of choice. Ordinary zinc-carbons have a much better price
    performance ratio in that type of applications. Never heard that a alkaline
    battery will harm a clock. I can't imagine how. Sounds like a fairy tale to

    petrus bitbyter
  4. Guest

    Since the wall clock uses very little current, doesn't the run time
    approach the shelf life of the cell? I thought alkalines were better
    than zinc-carbon cells for shelf life. I use only alkalines for the
    kids toys and flashlights and NIMH for the digicams.
  5. Chris

    Chris Guest

    Alkaline AA or AAA batteries have the same voltage as their
    non-alkaline counterparts. If this is a standard clock with mechanical
    moving hands and one or two AA or AAA cells, you can expect the
    alkalines to last at least twice as long. If these are standard 1.5V
    AA or AAA batteries, your salesperson doesn't know what they're talking
    about (it wouldn't be the first time!) Maybe they were out of stock on
    alkaline batteries. ;-)

    Your call.

    Good luck
  6. Decades ago, when zinc-carbon were the only thing available, they
    certainly had a tendency to leak. I remember ruined flashlights,
    and likely other things, because the batteries actually went bad rather
    than just ran out of power.

    So I know I avoided them as alkalines came along, and that's been
    at least a couple of decades. Maybe it was just the process used back
    then, and zinc-carbon don't leak these days, but I'm not sure I'd want to
    risk them in something that was more expensive than a flashlight.


  7. They are called "Heavy duty" these days.

  8. I have a pile of "Delancey" carbon zinc cells in my recycling bucket
    and they are all starting to leak.
  9. mowhoong

    mowhoong Guest

    The carbon/ zinc is still available, By ohm law current input to the clock is
    the same as alkaline battery, I think it may be too strong for the moving coil,
    hence foce apply to the small gear maight be too strong.
  10. No. Both zinc carbon and alkaline are voltage sources. About 1.5V. The
    current they actually supply, depends on the load, not on the chemistry. So
    the clock take what it needs, not what to source is able to give. If you
    have a heavy load (motors for instance) things change. An alkaline can
    provide much more current then zinc carbon and can provide that current for
    a longer time.

    petrus bitbyter
  11. Tom Biasi

    Tom Biasi Guest

    How often do you buy a new wall clock?
    Is the seller the same person?
    No such problems exist.
    Buy what fits in the clock.
    If you buy "Dollar Store" batteries with a strange name on them maybe they
    will leak, otherwise no difference.
  12. mowhoong

    mowhoong Guest

    Hi Tom
    I bought 4 set , use for diffrient place , other clock seller give the same
  13. Tom Biasi

    Tom Biasi Guest

    Are you sure they are not saying "Do not use RECHARGEABLE" alkalines?
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