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Synchronar charging

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ledlover

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Synchronar charging

Post08 Dec 2008, 17:18

How much exposure to sunlight is needed to recharge a drained synchronar? Should I leave it on the window sill, or should anywhere round the home suffice.
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bucko170

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: Synchronar charging

Post08 Dec 2008, 17:29

I have the original instructions for a Synchronar 2100 Mark 111 which gives the recharge times as....

Bright sunlight: 10 hours.
Bright overcast sunlight: 20 hours.
Dark overcast sunlight: 50 hours.
The above through a window: Double to triple the time.
100 watt bulb at 5 inches: 30 hours.
60 watt bulb at 3.5 inches: 30 hours.
15 watt with reflector at 5 inches: 30 hours.
Fluorescent lamp: Useless for charging.

Hope this helps.
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: Synchronar charging

Post08 Dec 2008, 17:33

From the horse's mouth, so to speak..... Thanks for that!
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Synchroserious

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: Synchronar charging

Post09 Dec 2008, 19:44

Remember these instructions are for the old Nicad batteries.So if it was made before 2002 the MK III instructions would still apply.Then again some have been rebuilt using similar Nicads.

8-10 inches to a 75- 100 watt bulb is close enough for 18 hours for the NIMH batteries used in Synchronars since 2002. 5 inches would be a little too hot for charging IMO. Figure About a 36% faster charge time than the MK III instructions for Nicads.
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rewolf

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Re: : Synchronar charging

Post09 Dec 2008, 20:49

Synchroserious wrote:Figure About a 36% faster charge time than the MK III instructions for Nicads.
Do I understand correctly: the new NiMH charge faster than the old NiCd? So do the NiMH have less capacity than the NiCd?
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Synchroserious

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: Synchronar charging

Post09 Dec 2008, 21:22

Yes they charge faster,not sure exactly why.I guess being a different chemical make up.

The NIMH charge faster,are safer for the enviroment and have virtualy no charge memory effect like the Nicads.
The only + with the Nicads was that when fully charged they could still display the time briefly or atleast keep track of time after a whole year in a dark drawer.The NIMH self discharge and may only go 5-8 months in a dark drawer.
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scytherman

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Re: Synchronar charging

Post08 Jan 2021, 09:46

I have a fully drained model iv; how long should I charge this?
Is it safe to leave it outside it the hot sunlight ?? Can the watch withstand the heat???
I am worried that the heat will ruin the reed magnets...

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