Solar Watch Charging Considerations (charging/heat limits/etc.)
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Thread: Solar Watch Charging Considerations (charging/heat limits/etc.)

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  1. #1
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    Solar Watch Charging Considerations (charging/heat limits/etc.)

    Hi everyone-

    Just got onto the forum and have a question regarding solar watches. If there’s a thread already let me know, I searched and got nothing.

    I have a Seiko solar and a Citizen Nighthawk Solar. Both manuals state to not leave the watch somewhere hot (i.e. dashboard); however, windowsills seem to be OK places to leave a watch. The manuals also state there’s a upper limit for temp for the watch exposure (such as 160 C).

    Anyone able to shed light how long a watch left on a windowsill is too long? Can they overheat or do damage in a few hours?

  2. #2
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    Quick typo. Meant to write 160 deg F...not C. That’s a scorcher!

  3. #3
    Member Sir-Guy's Avatar
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    Here’s a pretty good and lengthy discussion in the G-Shock forum.

    Best Way to Charge a Tough Solar G Without Frying It?
    https://r.tapatalk.com/shareLink?sha...7&share_type=t

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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    Thanks Sir-Guy! Lots to see there. I guess I’m more concerned about the oil in the watches thinning out. Neither watch has been left in the sun to the point that they’re too hot to touch. So I’m assuming I’m good.

  6. #5
    Member Wolfsatz's Avatar
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    Quote Originally Posted by PopsRacer View Post
    Thanks Sir-Guy! Lots to see there. I guess I’m more concerned about the oil in the watches thinning out. Neither watch has been left in the sun to the point that they’re too hot to touch. So I’m assuming I’m good.
    Unless your window still gets past the 100F, i’d say you are aafe.

    Dont put much logic into it... just get then some light and your good.




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  7. #6
    Member ffritz's Avatar
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    Quote Originally Posted by PopsRacer View Post
    I guess I’m more concerned about the oil in the watches thinning out.
    The condition of oils is a concern for mechanical watches, not for solar/quartz watches. No need to worry about that.
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  8. #7
    Member Nokie's Avatar
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    I have a number of solars and I always keep them next to a good source of outside light.

    I don't put them directly in the sun (because they don't need to be unless completely discharged), but next to good sunlight so they don't get baked, sun fade, overheated, etc.

    As long as they get a decent light source on a regular basis, they like that just fine.
    "Either he's dead or my watch has stopped"
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    "The only reason for time is so that everything does not happen at once..."
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  9. #8
    Member sticky's Avatar
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    My experience is that if I stick a solar out in the sunny garden it gets a good bit warmer than it would on the windowsill.

  10. #9
    Member BarracksSi's Avatar
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    Re: Solar Watch Charging Considerations (charging/heat limits/etc.)

    Mine recently showed its two-second skip to indicate low battery charge. I wore it during a cross-country drive, ten hours in the car, and it was fully charged by the time I got to the hotel.

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