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Batteries for Gossen Lunasix 3

Kenneth Amorino , Apr 23, 2007; 05:17 p.m.

I am very confused about replacing the batteries on an old Gossen Lunasix 3 light meter. I am wondering if I use silver oxide batteries are they a direct replacement for the mercury oxide batteries or do I need the battery adapter. Also are the Wein aircell batteries a direct replacement or, again, do I need the adapter. Or is the adapter just for alkaline cells. Are thoughts or knowledge on this subject would help. Thank you in adavnce. Ken

Responses


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Uncle Goose , Apr 23, 2007; 05:23 p.m.

You could use silver Oxide but they are about 1.5v while mercury is about 1.35v. Now, the difference is small but you meter may be off a little bit. This is no problem if you know it and you can adjust it. On the other hand, there are adaptors available to get the voltage right or could another type op battery that gives 1.35v and use an O-ring to make it fit. Maybe some other members have better or more handy ideas.

Dan Fromm , Apr 23, 2007; 06:48 p.m.

There is an adapter for the LunaPro/LunaSix 3 that fits in the battery compartment and holds 2 SR-44 cells. Gives the correct voltage, with it the meter does not have to be recalibrated. Used to cost around $18, I believe that these days it costs closer to $40. B&H sells 'em.

Kenneth, grit your teeth and buy one.

John Gleason , Apr 23, 2007; 07:33 p.m.

Frans de Gruijter sells adapters that hold one SR-44 cell, and they work like a charm. At current exchange rates, the cost for two would be about $40 (including shipping). An advantage over an adapter that holds 2 SR-44 cells is that you can also use these guys in devices that need just a single battery.

Kenneth Amorino , Apr 23, 2007; 07:41 p.m.

Does anyone know anything about the Wein air cell 1.35V batteries?

Uncle Goose , Apr 24, 2007; 04:43 a.m.

They can be used but they have the tendency to be depleted very fast, so be prepared to have some spares with you. But they are of course cheap as dirt.

Gary Watson , Apr 24, 2007; 07:17 a.m.

Sorry but I'd start shopping for a new meter that takes a AA.Anything that takes a PX625 is a relic.I have a stash of Varta merc cells for my elderly Nikon metered finders but wouldn't bother for a meter.Used Sekonic models like the 308, 318, and 328 aren't ruinously pricey.Try the silver oxides but what's the point if the meter's inaccurate?

Q.G. de Bakker , Apr 24, 2007; 11:47 a.m.

Things that take old batteries can still be (and often are) excellent machines. The suggestion they are not, just because they have existed for a while already, using the type of battery they take as a measure, is ridiculous.

Richard Fateman , Apr 24, 2007; 12:09 p.m.

See http://en.wikipedia.org/wiki/Mercury_battery

or google for mercury battery constant voltage. An alkaline battery's voltage varies too much. A silver battery varies less than alkaline, more than mercury, and it is (as UG above points out) not the right voltage, quite. Good luck.

Q.G. de Bakker , Apr 24, 2007; 02:36 p.m.

As Dan pointed out: there are adaptres that allow use of still available batteries without any voltage problems. You can get such an adapter for the Lunasix from Gossen themselves.


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