Dan,
following a table I compiled from Duracell sources and posted some times
ago:
In the Duracell pamphlet I found further information about size
compatible silver oxid button cells, which might be of interest for the
FAQ and recent discusion:
Duracell
Product IEC
ANSI
Number Drain mA Capacity mAh Load Ohms Type
Type
D301/386 0.10 120 15,000 SR43
1133S0
D303/357 1.50 165 1,000 SR44
1131S0
D381/391 0.10 40 15,000 SR55
1160S0
D389/390 0.11 70 13,000 SR54
1138S0
MS76 1.00 180 1,500 SR44
1184S0
For all types:
Nominal Voltage 1.55V, Rated Voltage Cutoff 1.2
Source: Duracel PDF files Date 2/97
To me it seems, that there are only two relevant cell typs: The MS76 and
D303/357.
The D303/357 has a smaller capacity and higher internal drain caused by
smaller internal resistance. The smaller internal resistance might help
to supply the OM more easyly with current, so in case a OM-2SP needs
much amps the voltage might not drop to much. This migth help to operate
sensible OM bodys, like the OM-2SP should be, more reliable.
But you have to change the batteries more often, because of the higher
drain and lower capacity of the cells.
The MS76 will live longer and let your OM body eat less batteries,
because of lower drain and higher capacity.
Richard
KFrohling replied:
>
> Richard Schtzl wrote:
>
> [major snip]
>
> >The MS76 will live longer and let your OM body eat less batteries,
> >because of lower drain and higher capacity.
>
> [another major snip]
>
> Yikes! This is contrary to my experience. My OM-2 was extremely
> unreliable for most of the last decade *because* I was using MS76
> batteries. Since I switched to 357's, no problems. (this after
> several attempts at servicing and an overhaul) I was about to
> give up on the old Oly until I saw Lee Hawkins FAQ and John's
> Camtech web page, and discovered the really problem!
>
> Unless you have no other option, use 357 silver oxides! The lower
> internal resistance makes it possible for the camera to draw about
> 50% more current without causing the voltage droop that can lockup
> your camera. Well worth the lower capacity, IMHO.
Dan Lau wrote:
snip..
> So it seems there are two distinct types of "SR44" batteries,
> those of the *357 variety and those of the *76 variety. I've
> never paid too much attention to that before, as they are all
> SR44 equivalents.
>
> My question is: Is there any difference between the *357
> variety and the *76 variety? Or should I continue to just
> get whatever kind is available and ignore the type. Given
> that there are two distinct ANSI spec's listed, there must
> be some differences between the two varieties. Does one
> perform better than the other in an Olympus camera? Thanks.
> -Dan
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