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replacing casio watch battery

Discussion in 'Electronic Repair' started by Jan Gregor, Sep 2, 2005.

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  1. Jan Gregor

    Jan Gregor Guest

    I have casio watches aq-150w with cr-2016 battery. Watches
    stopped after 5years so i bought a new one. Battery was
    catched by a metal plate which i successfully removed,
    replaced battery and installed metal plate again.

    And there's a problem - watches dont go - no digits on led display,
    no movement of hands. On the back plate was a message to connect
    battery(+) with AC by tweekles on battery replacement. label AC
    i found on metal case and is connected normally.

    voltage of old battery was 1.6V, the new one has 3V. so this is OK.


    Can anyone help me ?
     
  2. David Sewell

    David Sewell Guest

    Why did you replace a 1.5v battery with a 3v you may have killed your watch!
    David
     
  3. Jan Gregor

    Jan Gregor Guest

    It's old battery so voltage is lower - batteries are same type CR2016,
    same brand (Panasonic).


    Jan
     
  4. Make sure you give the battery a good firm 'clean ' with a suitable lint
    free cloth. Sometimes the protective coating on the new battery will prevent
    connection.
     
  5. Bob Shuman

    Bob Shuman Guest

    Make sure the battery is oriented the correct way and that the metal spring
    battery contacts have enough pressure to make a good electrical connection.
    Make sure they are not shorting at the edge of the battery and re-check to
    make sure the battery is still good as if it was shorted it will now be
    dead. Also make sure that the side body switches were not disturbed during
    replacement and still work properly.

    Bob
     
  6. jakdedert

    jakdedert Guest

    Also, don't rely on the watch display powering up before everything is
    screwed back down. That caught me once. I put in new battery, held it
    down and no display action. After doing all the above, still no display.

    Then I screwed the back on, and everything is hunky-dory.

    jak
     
  7. Chuck Reti

    Chuck Reti Guest

    Many Casio watches do have a tiny hole or a contact labeled "AC".
    Following battery replacement, you have to use either tweezers or a
    paper clip, short wire, etc. to touch together the AC connection and
    battery (+) for a few seconds, which "jump starts" the watch. Have
    recently had to do this with Casio Databank and Illuminator watches. As
    mentioned earlier, you also have to be careful that any pushbuttons are
    pushed to their "out" positions before setting the watch innards back in
    the case.
     
  8. Jan Gregor

    Jan Gregor Guest

    thanks. maybe invisible coating, maybe bad contact - after little
    playing with contacts and battery back i saw on display digits and
    watches go again !!!


    Jan
     
  9. Asimov

    Asimov Guest

    "David Sewell" bravely wrote to "All" (02 Sep 05 09:13:53)
    --- on the heady topic of "Re: replacing casio watch battery"

    DS> From: "David Sewell" <>
    DS> Xref: core-easynews sci.electronics.repair:341167

    DS> Why did you replace a 1.5v battery with a 3v you may have killed your
    DS> watch! David

    A CR-2016 is a 3v Lithium cell: a dead one is normal to measure 1.5v.

    A*s*i*m*o*v

    .... High Voltage Electronics: Life's a glitch, then you fry.
     
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