“Autonomy theoretic of battery”
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Thread: “Autonomy theoretic of battery”

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  1. #1
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    “Autonomy theoretic of battery”

    Autonomy theoretic of battery, what does this mean? It’s on the ETA caliber page. Stated as 180 months

  2. #2
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    Re: “Autonomy theoretic of battery”

    It means how long the battery lasts under normal load.

    I assume you are looking at an ETA 955.652 as used in the Sinn Hydro series.
    15 years is unusually long, but look at the size of the CR2016 battery, it's enormous!
    Presumably they used that because the oil fill makes battery changing such a pain.

    According to the spec, the 15 year battery life is based on a 90 mAh battery capacity.
    Claimed capacity for CR2016 seem to vary from 75 to 100, so in practice it might depend on which battery you use.

    The 955.652 is thermocompensated.
    ronalddheld likes this.

  3. #3
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    Re: “Autonomy theoretic of battery”

    And pushing the seconds hand through all that oil results in a seven year life in the UX. Still pretty good.


    Sent from my iPhone using Tapatalk

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  5. #4
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    Re: “Autonomy theoretic of battery”

    Thanks, yes it was the 955.652 I was referring to. But not in the Sinn. Instead the one I am looking at is a Wempe Zeitmeister quartz.

    Anyone know now when and what kind of maintenance is required on this movement? Is the battery changeable simply?

  6. #5
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    Re: “Autonomy theoretic of battery”

    hughesyn likes this.

  7. #6
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    Re: “Autonomy theoretic of battery”

    That's a HAQ watch I wasn't aware of.

    Thanks for sharing.

  8. #7
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    Re: “Autonomy theoretic of battery”

    Quote Originally Posted by hughesyn View Post
    That's a HAQ watch I wasn't aware of.

    Thanks for sharing.
    https://forums.watchuseek.com/f9/anot...q-2741426.html

    But yeah, it's definitely one we forget.

    Note that it's a big, high-voltage battery...3V, not 1.55. You get to trade off voltage for current draw, as a rule, so happy, happy...15 year battery life.

    A 2016 is just a big tank of a button cell, so it should be trivial. That said...I would personally probably send it back to the factory, for any check-up that might be possible and ensure it gets re-sealed properly. These are nice pieces. There's a couple listed on chrono24 from German dealers...unworn with papers, approx $1100-1200.
    The truth is rarely pure and never simple.

    Oscar Wilde, The Importance of Being Earnest

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