You should read this: <http://www.buhla.de/Foto/batt-adapt-US.pdf>
It will tell you everything you ever wanted to know (and maybe more)
about means of working around the mercury battery problem. Zinc-air
cells are discussed on page 2. Pay particular attention to the problem
(and solutions) of stacking zinc-air cells because they require air to
reach the holes punched into the case for air to enter. The Wein cell
(specialized non-hearing aid zinc-air battery) is also discussed.
Chuck Norcutt
On 7/10/2012 9:55 AM, Chris Trask wrote:
> Yesterday I got started on converting a Gossen Luna Pro and a Lunasix
> from mercury batteries to silver oxide. While browsing an
> electronics parts catalogue to double-check the dimensions for a
> nylon spacer sleeve, I happened to notice that zinc-air bateeries are
> available in the same size as the SR44 silver oxide batteries. Since
> the zinc-oxide batteries are 1.4V I was wondering if they are
> suitable as a drop-in replacement for the 1.35V mercury batteries.
> If so, it would negate the need to take the light meters apart to do
> the conversion and I would only need to make the nylon spacer
> sleeve.
>
> The zinc-oxide batteries have a capacity of 600mAh, well above the
> 170mAh of the silver oxide batteries.
>
> Anyone know of this substitution having been made?
>
> Chris
>
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